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Lesson details

Key learning points

  1. In this lesson, we will learn how to use the "Round and Adjust" strategy to help us solve addition equations.

Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

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3 Questions

Q1.
Solve the following word problem: Bob the builder worked for 28 days last month. This month he worked 18 days. How many days has he worked altogether?
18+18=36
28-18=10
Correct answer: 28+18=46
Q2.
Solve the following word problem: There were 51 builders on site. 32 were building houses and the rest were driving diggers. How many builders were driving diggers?
32+32=35
Correct answer: 51-32=19
51+32=83
Q3.
Solve the following word problem: Ms. Dobrowolski bought 54 bricks at the store. She used 38 of them to start building a summer house. How many bricks does she have left?
Correct answer: 54-38=16
54-38=26
54+38=92

3 Questions

Q1.
What is the nearest multiple of ten to 49?
10
40
Correct answer: 50
Q2.
What is the nearest multiple of 10 to 79?
10
70
Correct answer: 80
Q3.
Use the "round and adjust" strategy to solve the following equation: 42+39=?
80
Correct answer: 81
82