Last week room 19 did some subtraction problem solving with our maths mates. These are some of the strategies I used for this question
Rhiannon had $52.00 in her bank account. Mum borrowed some money. Rhiannon had $48.00 left in her bank account. How much money did mum borrow?
The question was 52 - ☐ = 48
52 - 2 = 50 50 - 2 = 48
2 + 2 = 4
52 - 4 = 48
This is my reversibility strategy
48 + ☐ = 52
48 + 2 = 50 + 2 = 52 2 + 2 = 4
48 + 4 = 52
This is another strategy
52 - 48 = ☐
52 - 2 = 50 50 - 6 = 44
44 - 40 = 4
52 - 48 = 4
I hoped you learned something from me today.
If you have any other strategies please share them with me by commenting. I hope you enjoyed this blog post.📖
Rhiannon had $52.00 in her bank account. Mum borrowed some money. Rhiannon had $48.00 left in her bank account. How much money did mum borrow?
The question was 52 - ☐ = 48
52 - 2 = 50 50 - 2 = 48
2 + 2 = 4
52 - 4 = 48
This is my reversibility strategy
48 + ☐ = 52
48 + 2 = 50 + 2 = 52 2 + 2 = 4
48 + 4 = 52
This is another strategy
52 - 48 = ☐
52 - 2 = 50 50 - 6 = 44
44 - 40 = 4
52 - 48 = 4
I hoped you learned something from me today.
If you have any other strategies please share them with me by commenting. I hope you enjoyed this blog post.📖
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