PencilGoGrade 1 · Math · Operations
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Grade 1 Math Worksheet - Challenge Me
Write the missing number.
19 + = 20
18 - = 1
15 - = 2
- 3 = 7
+ 5 = 9
10 + = 11
10 + = 13
5 + = 7
+ 6 = 17
- 1 = 11
11 + = 20
+ 2 = 7
+ 17 = 19
- 5 = 12
20 - = 2
+ 6 = 12
- 1 = 7
15 - = 5
A missing-number equation asks what number makes the sentence true, such as 5 - ____ = 3 or ____ + 4 = 9. It is the first step toward algebra, and it teaches that the equals sign means both sides are the same amount. It also lets a child use adding to check subtracting, because the missing number in 9 - ____ = 4 is found by asking what goes with 4 to make 9.
On this grade 1 worksheet each line is an addition or subtraction sentence with one gap, and your child writes the missing number on the line. The gap can be in any place. Support sheets stay within 10, and standard and challenge sheets go up to 20.
Common Core standard: 1.OA.D.8
9 - ____ = 4. Think: 4 and what make 9? 4 + 5 = 9, so the missing number is 5.
Writing the answer to the whole sentence instead of the number that fits in the gap, or adding when the sentence subtracts.
Say the sentence out loud with a question word in the gap, then think of the matching fact.
Writing the answer to the whole sentence instead of the number that fits in the gap, or adding when the sentence subtracts.
Say the sentence out loud with a question word in the gap, then think of the matching fact.
Yes. All 6 printable versions on this page are free to download and print, with no account needed.
Similar: Add and Subtract Word Problems · Three-Number Word Problems
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