Math
Unit 1
3rd Grade
Lesson 14 of 14
Solve one- and two-step word problems involving addition and subtraction, using rounding to assess the reasonableness of answers.
Ms. Needham is fastening papers together for report card conferences. Here's what she's using:
There are 225 paper clips in the box to the left. Ms. Needham has already used 771 staples from the box on the right.
a. How many staples are there remaining in the box on the right?
b. Use your answer in Part (a) to write a second problem for your classmate to solve.
Mary read 342 pages in July and 231 pages in August. This was 174 more pages than she needed to read for her school’s summer reading challenge. How many pages was she supposed to read for the summer reading challenge? Solve. Then assess the reasonableness of your answer.
Mrs. Ingall is going to a hockey game. She has $139 in her pocket and wants to take out more cash to be able to pay for everything at the game. She will have to pay $268 for the tickets, $18 for a cab ride to the game, and $55 for food and drinks while she’s there. Approximately how much money should Mrs. Ingall take out of the bank to cover her costs?
There were 485 Red Sox fans and some Yankees fans in Fenway Park at a baseball game. In all, there were 649 fans at Fenway. Then 28 more Yankees fans came to Fenway.
a. How many Yankee fans are at Fenway in total?
b. Is your answer reasonable? Explain why or why not.
The Extra Practice Problems can be used as additional practice for homework, during an intervention block, etc. Daily Word Problems and Fluency Activities are aligned to the content of the unit but not necessarily to the lesson objective, therefore feel free to use them anytime during your school day.
Lesson 13
Topic A: Foundations of Place Value
Topic B: Rounding to the Nearest Ten and Hundred
Topic C: Addition and Subtraction Within 1,000
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