Choosing appropriate addition strategies

Maths

Addition and subtraction

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?

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?

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?

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?

Using the strategy round and adjust, add the following three numbers together: 4001 + 3997 + 2005 =

What's the same? What's different? 364 + 302 = 666 and 374 + 302 = 676

What's the same? What's different? 764 - 204 = 560 and 754 - 204 = 550

What's the same? What's different? 3672 + 1474 = 5146 and 3972 + 1474 = 5446

If... 362 + 205 = 567 then... 262 + 205 = ?

If... 751 - 303 = 448 then... 741 - 303 = ?

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