Objective: Subtract one, two or three-digit numbers by counting back. © Hamilton Trust Stepping Up Term 3 Week 3 Day 1.

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Presentation transcript:

Objective: Subtract one, two or three-digit numbers by counting back. © Hamilton Trust Stepping Up Term 3 Week 3 Day 1

Counting back to subtract numbers looks like this: < < << < < -6

© Hamilton Trust Stepping Up Term 3 Week 3 Day 1 Let’s have a go together… < < << < < -7

© Hamilton Trust Stepping Up Term 3 Week 3 Day 1 Write 500 at the top of a sheet of paper. Subtract 6 and write the new number underneath. Keep subtracting 6… How low can you go in 2 minutes?!

© Hamilton Trust Stepping Up Term 3 Week 3 Day 1 Counting back to subtract a 2-digit number: = < < 948

© Hamilton Trust Stepping Up Term 3 Week 3 Day 1 Counting back to subtract a 3-digit number: 645 – 201 = < < 445

© Hamilton Trust Stepping Up Term 3 Week 3 Day 1 Counting back to subtract a 3-digit number: 475 – 199 = < <

© Hamilton Trust Stepping Up Term 3 Week 3 Day 1 Choose one to check with addition. It’s drill time again… Aim to be a subtraction sergeant!