We have been using RaPaCoDaNumBo to solve maths questions mentally. I am going to ask a question which I’d like you to solve mentally using one of the 5 strategies. Once you’ve answered it and said which strategy you have used I want you to write another question for the next person to answer using a mental strategy. Let’s see how many questions we can do.

1) 150 + 151 =

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The answer to that question is 301 the next question will be

650+350=?

1000 number bonds

794+365

The answer to your question Jenna is number bonds to 1 thousand

351 + 150 ?

The answer to your question is 1 thousand and 59

822+149 ?

971 round and adjust

I used portioning for Sophia’s last question.

705+679

The answer is 1384. I used round and adjust.

The next question is 615 – 530

The answer is 85 the next question is 699+324

The answer is 1000

the next question is 945 + 861 = ?

1000-number bonds next one is

907 + 698

1000-number bonds next one is

990 + 698

1000-numbo next one is

990 + 698

1000 next one is

990 + 698

1000 next one is

990 + 698

1000 next one is

990 + 698

1000 next one is

990 + 698

1000 next one is

990 + 698

1000 next one is

990 + 698

1000 next one is

990 + 698

1000 next one is

990 + 698

1000 next one is

990 + 698

1000 next one is

990 + 698

1000 next one is

990 + 698

650+350=1000,The next question is 961+750?

Connie yours in 16,111. I used round and adjust. The next one is 794 add 471.

It is 16,111. I used round and adjust. The next one is 794 add 471.

For Chloe’s question I used portioning. The answer is 1121 the next question is 1234+12,897=