Rules for Subtraction Using Partitioning
Rules for Subtraction Using Partitioning. Read the question and put the biggest number at the front and the smallest number next Never Swap them around! 95 - 46. You now partition (or separate) the second number into its place value houses 95 – 46 (40, 6).
Rules for Subtraction Using Partitioning
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Presentation Transcript
Read the question and put the biggest number at the front and the smallest number nextNever Swap them around!95 - 46
You now partition (or separate) the second number into its place value houses95 – 46 (40, 6)
Step 1Take away the first part of the partition number from the first number we haven’t touched95 – 46 (40, 6)95 – 40 = 55
Step 2Take the second part of the partitioned number and take it away from the answer of STEP 1 – you have your answer!95 – 46 (40, 6)95 – 40 = 5555 – 6 = 49
Stage 5At stage 5 children will be using this strategy with 2 digit numbers as follows:75 – 56 (50, 6)75 – 50 = 2525 – 6 = 19
Stage 6At stage 6 children will be using this strategy with 2 and 3 digit numbers as follows:752 – 456 (400, 50, 6)752 – 400 = 352352 – 50 = 302302 – 6 = 296
