Number (add/sub)
Hong Kong
Stage 1
Use strategies to add/subtract two digit numbers
Interactive practice questions
If $28+20=48$28+20=48, what is the answer to $28+18$28+18?
Easy
< 1min
If $43+20=63$43+20=63, what is the answer to $43+22$43+22?
Easy
< 1min
If $90-26=64$90−26=64, what is the answer to $91-26$91−26?
Easy
< 1min
If $80-23=57$80−23=57, what is the answer to $78-23$78−23?
Easy
< 1min
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