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Addition and subtraction Multiplication and division Fractions Fractions operations Decimals Order of operationsHere you will learn about two-step word problems, including how to solve a two-step word problem, how to represent these problems using equations, and how to assess the reasonableness of answers.
Students will first learn about two-step word problems as part of operations and algebraic thinking in 3 rd grade and will continue using this skill throughout elementary and middle school.
Two-step word problems are word problems or story problems that require two steps to find the answer. These two steps can involve the same operation or two different operations.
To solve a two-step word problem, you must read the problem carefully before identifying each of the two steps. After identifying the two steps, you can write an equation for each step. Then you will need to solve each equation in order before arriving at the final answer.
For example,
Sarah had \$15. She spent \$8 on a new book. Then her mom gave her \$5. How much money does she have now?
We can break down the problem into steps and write an equation.
Sarah starts with \$15, so this is the starting number.
Then she spends \$8 on a new book. This means you need to subtract \$8. This is step one.
\$15-\$8 = xx represents the amount of money Sarah has after buying the book.
\$15-\$8=\$7Next, Sarah receives \$5 from her mom. This needs to be added to the remaining amount from step one. This is step two.
\$7 + 5 = tt represents the total of money Sarah has after her mom gave her \$5 .
\$7+5=\$12Sarah has \$12 now.
You can also write an equation showing both steps and use the order of operations rules to solve.
After solving the problem, you should ask yourself: Is my answer reasonable?
You can use quick mental math or estimation to see if your answer is reasonable.
You can round the \$8 to \$10 to make the estimation easier.
\$15-\$10 + \$5 = \$10, so Sarah has about \$10 left. This means the answer of \$12 is reasonable.
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In order to solve two-step word problems:
Hannah bought 2 bags of candy for trick-or-treaters. One bag had 78 pieces of candy and the other had 92 pieces of candy. Hannahβs friend came over and dumped another bag of candy in the bowl. This bag had 124 pieces of candy. How many pieces of candy are in the bowl altogether?
First, you need to find out the total number of pieces Hannah dumped into the bowl from her two bags.
78+92=x2Identify the second step and write an equation.
Next, you need to add the total pieces that Hannahβs friend dumped into Hannahβs total from the previous step.
x+124=c3Solve the equations in order.
78 + 92 = 170 170 + 124 = 294There are a total of 294 pieces of candy in the bowl.
4Assess the reasonableness of your answer.
You can use mental math or estimation to see if your answer is reasonable.
You can quickly round each number to 100, which gives you a total of 300 pieces of candy. This is close to the actual answer of 294, so the answer is reasonable.
A teacher ordered 8 new boxes of pencils for her classroom. Each box of pencils had 16 pencils. She decided to combine all of the pencils, and then split them evenly between the 4 student tables in the room. How many pencils will each table get?
Identify the first step and write an equation.
First, you need to find the total number of pencils in all the boxes.
8 \times 16=x
Identify the second step and write an equation.
Next, you need to divide the total number of pencils by the number of tables.
x \div 4=p
Solve the equations in order.
Each table will get 32 pencils.
Assess the reasonableness of your answer.
You can use mental math or estimation to see if your answer is reasonable.
8 \times 20= about 160 total pencils divided by 4 tables = about 40 pencils on each table. So the answer of 32 is reasonable.
A cookie recipe calls for \cfrac{1}{2} cup of white sugar and \cfrac{3}{4} cup of brown sugar.
The baker is making 6 batches of cookies. What is the total amount of sugar (white and brown) that will be used?
Identify the first step and write an equation.
First, you need to add the amounts of sugar to find the total amount of sugar needed for 1 batch.
\cfrac{1}{2}+\cfrac{3}{4}=x
Identify the second step and write an equation.
Next, you need to multiply the total amount of sugar by the number of batches being made.
x \times 6=s
Solve the equations in order.
7 \cfrac{1}{2} total cups of sugar will be needed for 6 batches of cookies.
Assess the reasonableness of your answer.
You can use mental math or estimation to see if your answer is reasonable.
\cfrac{1}{2} and \cfrac{3}{4} is a little more than 1 cup.
Since there will be 6, the answer will be more than 6 cups.
Therefore, the answer of 7 \cfrac{1}{2} cups is reasonable.
Chris makes \$12.50 an hour at his job at the roller skating rink. He worked 25 hours. After he got his paycheck, he spent \$65 on a new pair of shoes. How much money does he have left from his paycheck?
Identify the first step and write an equation.
First, you need to find out how much money Chrisβs paycheck was by multiplying the hourly rate by the number of hours he worked.
12.50 \times 25=x
Identify the second step and write an equation.
Next, you need to subtract \$65 from the total paycheck amount.
x-65=m
Solve the equations in order.
Chris has \$247.50 left from his paycheck.
Assess the reasonableness of your answer.
You can use mental math or estimation to see if your answer is reasonable.
To estimate the amount of Chrisβs paycheck, you can multiply 12 by 25. You could also multiply 12 by 30, but note this will be a high estimate.
12 \times 25=300-65 = \$235 which makes \$247.50 a reasonable answer.
Five 5 th grade classes each have 24 students and 2 teachers attending a field trip. Each bus can hold 48 people. How many buses are needed to carry all of the students and teachers to the field trip?
Identify the first step and write an equation.
First, you need to find out how many students and teachers are attending the field trip altogether. To do this, you will need to multiply 5 \times 26.
5 \times 26=x
Identify the second step and write an equation.
Next, you need to divide the total number of people by the number of people each bus can carry.
x \div 48=b
Solve the equations in order.
Now that you have identified the steps, you can solve the equations in order.
For this problem, you will need to refer back to the question in order to interpret the remainder. It asks: How many buses are needed to carry all of the students and teachers to the field trip?
So in this word problem, the answer 2 \; R \, 34 represents 2 full buses with 34 people leftover. Since those 34 people also need a bus to ride to the field trip, you would round up the answer to 3 so that all people can attend the field trip.
3 buses are needed to carry all of the students and teachers to the field trip.
Assess the reasonableness of your answer.
You can use mental math or estimation to see if your answer is reasonable.
There are about 125 people attending the field trip (about 25 people \times 5 classes) and about 50 people can fit on a bus. 125 \div 50=2.5, so the answer of 3 buses is reasonable.
Haruki had 39 books. He got 7 more books for his birthday. His bookshelf has 4 shelves. He wants to put the same number of books on each shelf and put the remaining books on top of his bookshelf. How many books will go on top of Harukiβs bookshelf?
Identify the first step and write an equation.
First, you need to determine how many books Haruki has altogether.
So step 1 is to add to find the total number of books.
39+7=x
Identify the second step and write an equation.
Next, you will need to divide the total number of books by the number of shelves Haruki has.
x \div 4=b
Solve the equations in order.
Now that you have identified the steps, you can solve the equations in order.
For this problem, you will need to refer back to the question in order to interpret the remainder. It asks: How many books will go on top of Harukiβs bookshelf?
So in this word problem, the remainder is your answer.
2 books will go on top of Harukiβs bookshelf.
Assess the reasonableness of your answer.
You can use mental math or estimation to see if your answer is reasonable.
Haruki has about 45 books that he wants to divide equally between 4 shelves, which means there would be about 11 books on each shelf with about 1 left over. So the answer of 2 books is reasonable.
1. Frankie has \$287 in her checking account. She spent \$56 on her phone bill and then spent \$39 at dinner. How much money is left in her account?
This is a two-step subtraction word problem, meaning each of the two steps involves subtraction.
1 st step: Subtract the amount spent on the phone bill.
2 nd step: Subtract the amount spent at dinner from what is left after step 1.
\begin{aligned} & \$ 287-\$ 56=\$ 231 \\\\ & \$ 231-\$ 39=\$ 192 \end{aligned}
2. Elliot has 145 marbles in his collection. He lost 18 marbles and then bought 27 more. How many marbles does he have now?
154 marbles
190 marbles
136 marbles
100 marbles
This two-step word problem involves two different operations.
1 st step: Subtract the number of marbles Elliot lost.
2 nd step: Add the number of marbles Elliot bought to the total remaining marbles from step 1.
145-18 = 127
127 + 27 = 154 marbles
3. Mrs. Smith baked 24 cookies in the morning and 18 cookies in the afternoon. If she wants to pack them into bags of 6 cookies each, how many bags of cookies will she have in total?
42 bags
6 bags
48 bags
7 bags
This two-step word problem involves two different operations.
1 st step: Find the total number of cookies Mrs. Smith baked.
2 nd step: Divide the total number of cookies by the number of cookies per bag to find the total number of bags.
24+18=42
42 \div 6=7 bags
4. Sarah has 15 comic books. She decides to buy 5 more comic books at the store. Each comic book costs \$3.50. If she also buys a poster for \$8, how much money will Sarah spend in total?
This two-step word problem involves two different operations. Also note that there is an extra bit of unnecessary information in the word problem (Sarah has 15 comic books).
1 st step: Determine the total cost of the comic books Sarah buys.
2 nd step: Add the amount spent on the poster to the total from step 1.
\begin{aligned} & \$ 3.50 \times 5=\$ 17.50 \\\\ & \$ 17.50+\$ 8=\$ 25.50 \end{aligned}
5. Libby is selling boxes of cookies for a fundraiser at her school. So far, she has sold 29 boxes of cookies for \$12 each. If she has a goal of raising \$400, how much more money does she need to earn?
This two-step word problem involves two different operations.
1 st step: Multiply to find the amount Libby earned from selling 29 boxes of cookies.
2 nd step: Determine how much more money Libby needs to earn to reach her goal by subtracting the total from step 1 from her goal amount.
\begin{aligned} & 29 \times \$ 12=\$ 348 \\\\ & \$ 400-\$ 348=\$ 52 \end{aligned}Β
6. Georgio has 128 complete fossils in his collection. He donated 19 fossils to a local museum. He wants to arrange the rest of his fossils in a display case in his house. The display case has 7 shelves. If he wants to put the same number of fossils on each shelf, how many will go on each shelf?
This two-step word problem involves two different operations.
1 st step: Subtract to find the number of fossils remaining after donating to the museum.
2 nd step: Determine how many fossils Georgio can put on each shelf by dividing the remaining fossils by the number of shelves.
\begin{aligned} & 128-19=109 \\\\ & 109 \div 7=15 \mathrm{R} 4 \end{aligned}Β
Two-step word problems are word problems or story problems that require two steps to find the answer. These two steps can involve the same operation or two different operations.
To solve a two-step word problem, you must read the problem carefully before identifying each of the two steps. After identifying the two steps, you can write an equation. Then you will need to perform each step in the correct order before arriving at the final answer.
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