1st grade adding within 100 worksheets
Your child adds a two-digit number and a one-digit number or a multiple of 10, such as 34 + 5 or 52 + 30, thinking in tens and ones.
Common Core 1.NBT.C.4 (Number and Operations in Base Ten)
Sample problems
- Sample 142 + 2 = ?
Answer: 44
- Sample 270 + 4 = ?
Answer: 74
- A bit harder24 + 20 = ?
Answer: 44
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