Home Learning Maths Subtraction Strategies

Last week our class was doing subtraction for maths.

Here are 3 of my strategies.

Mrs Olesen saved $3024 for her summer holiday. She ended up spending $2795. How much money did she have left after her holiday?

Place Value

3024 - 2795 =

3024 - 2000➝ 1024

1024 - 700➝ 324

324 - 90➝ 236

236 - 5 = 229

Equal Adjustments

3024 - 2795 =

+5      +5

3029 - 2800 = 229

Reversibility

3024 - 2795=

2795 + 229 = 3024

2795 +5 ➝2800

2800 + 200➝3000

3000 + 20➝3020

3020 + 4 = 3024

5+200+20+4=229

Mrs Olesen had $229 left after her holiday.