PencilGoGrade 1 · Math · Place value operations
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Grade 1 Math Worksheet - Building Confidence
Write the sum on the line.
20 + 50 =
30 + 9 =
30 + 10 =
5 + 70 =
40 + 2 =
10 + 60 =
50 + 10 =
6 + 80 =
30 + 8 =
20 + 80 =
30 + 60 =
1 + 60 =
60 + 4 =
20 + 40 =
8 + 90 =
60 + 20 =
Adding within 100 in first grade means adding a two-digit number and a one-digit number, or adding tens, without carrying: 30 + 4, 40 + 30 or 23 + 5. The skill is seeing that the tens and the ones can be added on their own: 23 + 5 leaves the 2 tens alone and adds 3 + 5 = 8 ones. This worksheet is a clean page of addition sentences in one shape: two numbers, a plus sign and a line for the sum.
Support sheets add a ten and a one, such as 30 + 4, and whole tens, such as 40 + 30. Standard sheets add a one-digit number to a two-digit number. Challenge sheets add tens to a two-digit number, such as 34 + 20. None of the sums needs carrying.
Common Core standard: 1.NBT.C.4
23 + 5: the 2 tens stay. 3 ones and 5 ones make 8 ones. So 23 + 5 = 28. Write 28.
Adding the ones to the tens digit, so writing 73 for 23 + 5.
Add the tens and the ones separately, then put them together.
Adding the ones to the tens digit, so writing 73 for 23 + 5.
Add the tens and the ones separately, then put them together.
Yes. All 6 printable versions on this page are free to download and print, with no account needed.
Similar: Ten More and Ten Less · Subtract Tens
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