Choosing appropriate addition strategies

Choosing appropriate addition strategies

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Lesson details

Key learning points

  1. In this lesson, we will look at addition equations and decide the best and most efficient strategy we could use to solve them.

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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5 Questions

Q1.
What's the same? What's different? 364 + 302 = 666 and 374 + 302 = 676
1 part has decreased by 10
Correct answer: 1 part has increased by 10
1 part has increased by 100
Q2.
What's the same? What's different? 764 - 204 = 560 and 754 - 204 = 550
Correct answer: 1 part has decreased by 10
1 part has decreased by 100
1 part has increased by 10
Q3.
What's the same? What's different? 3672 + 1474 = 5146 and 3972 + 1474 = 5446
1 part has decreased by 300
1 part has increased by 30
Correct answer: 1 part has increased by 300
Q4.
If... 362 + 205 = 567 then... 262 + 205 = ?
Correct answer: 467
667
67
Q5.
If... 751 - 303 = 448 then... 741 - 303 = ?
Correct answer: 438
458
48

5 Questions

Q1.
Mrs Crane is using the strategy near doubles to solve the following equation: 3014 + 3007 = ... Which of the following near doubles should she use to help her calculate the answer?
Correct answer: 3000 + 3000
3100 + 3100
4000 + 4000
Q2.
Mrs Crane is using the strategy near doubles to solve the following equation: 4136 + 4122 = ... Which of the following near doubles should she use to help her calculate the answer?
4000 + 4000
Correct answer: 4100 + 4100
4200 + 4200
Q3.
Mrs Crane is using the strategy round and adjust to solve the following: 4543 + 3003 = ... Which of the numbers in the equation should she use to round and adjust?
Correct answer: 3003
4543
Q4.
Mrs Crane is using the strategy round and adjust to solve the following: 3783 + 2998 = ... Which of the numbers in the equation should she use to round and adjust?
Correct answer: 2998
3783
Q5.
Using the strategy round and adjust, add the following three numbers together: 4001 + 3997 + 2005 =
10,000
Correct answer: 10,003
8000

Lesson appears in

UnitMaths / Addition and subtraction