Class 2 maths · A.7 · Place Value to 1,000
Mentally add 10 or subtract 10
Only the tens digit changes by one. Watch for a new hundred.
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Pia says: What is 10 less than 123?
Answer: 113
Mo wonders: What is 10 less than 290?
Answer: 280
Fay thinks: What is 10 more than 108?
Answer: 118
Tip: Only the tens digit changes by one. Watch for a new hundred.
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