? - 5 = 10
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Find the Unknown in the Addition and Subtraction Equation
Name
Grade
School
Date
Questions10
Score
1
2
7 + 6 = ?
3
2 + 1 = ?
4
19 - ? = 16
5
4 + ? = 7
6
9 - 4 = ?
7
? - 3 = 17
8
? + 1 = 3
9
16 - ? = 12
10
16 - ? = 11
Answers Key
1
15 - 5 = 10
2
7 + 6 = 13
3
2 + 1 = 3
4
19 - 3 = 16
5
4 + 3 = 7
6
9 - 4 = 5
7
20 - 3 = 17
8
2 + 1 = 3
9
16 - 4 = 12
10
16 - 5 = 11
Determine Unknown in Addition and Subtraction Equation Worksheet
The CCSS.MATH.1.OA.D.8 worksheets with answers for 1st grade students to practice problems on Determine the unknown whole number in an addition or subtraction equation, with the unknown in any position (e.g., 8 + ? = 11, 5 = ? - 3, 6 + 6 = ?) is available online for free in printable and downloadable (pdf & image) format. For more questions and answers on 1.OA.D.8 math activities, tap on generate new worksheet to learn, practice, test and verify math skills under the common core cluster (1OAD) work with addition and subtraction equations in domain operations and algebraic thinking.
How to Use this Worksheet
Objective
To practice these math problems of 1OAD8 worksheets, students are required to determine the unknown whole number in an addition or subtraction equation, with the unknown in any position. Users can directly refer the answer key to verify the work with steps for the corresponding practice problems given in the 1.OA.D.8 activities under the domain operations and algebraic thinking in common core state standards for 1st grade mathematics. The main objective of these 1.OA.D.8 practice problems and answers is to make students to understand how to (1OAD) work with addition and subtraction equations.
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