Well done Petra. I can see you have used place value partitioning and rounding and compensating to solve some of these problems. Some of your explanations are very good, some are a little vague. Think about using reverability for slide 7 instead of 96-97=____, you can go 96 + ____= 97. I'm also very interested to find out your strategy to work out slide 9. Have another go please! :)
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Well done Petra. I can see you have used place value partitioning and rounding and compensating to solve some of these problems. Some of your explanations are very good, some are a little vague. Think about using reverability for slide 7 instead of 96-97=____, you can go 96 + ____= 97. I'm also very interested to find out your strategy to work out slide 9. Have another go please! :)
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