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# Common Core Standard 1.OA.C.6 Questions

Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).

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Grade 1 Addition CCSS: 1.OA.C.6
What is 2 + 10?
1. 20
2. 12
3. 10
4. 14
Grade 1 Addition CCSS: 1.OA.C.6
12 + 3 =
1. 5
2. 10
3. 15
4. 1
Grade 1 Addition CCSS: 1.OA.C.6
15 + 1 =
1. 14
2. 16
3. 15
4. 10
Grade 1 Addition CCSS: 1.OA.C.6
14 + 3 =
1. 17
2. 16
3. 14
4. 9
Grade 1 Addition CCSS: 1.OA.C.6
9 + 9
1. 10
2. 15
3. 18
4. 20
Grade 1 Addition CCSS: 1.OA.C.6
5 + 6 =
1. 11
2. 12
3. 6
Grade 1 Addition CCSS: 1.OA.C.6
7 + 7 =
1. 14
2. 15
3. 16
4. 13
Grade 1 Addition CCSS: 1.OA.C.6
1 + 3 =
1. 1
2. 3
3. 4
4. 2
Grade 1 Addition CCSS: 1.OA.C.6
$9+5=$
1. 13
2. 12
3. 14
4. 9
Grade 1 Addition CCSS: 1.OA.C.6
9 + 3 =
1. 13
2. 11
3. 12
Grade 1 Subtraction CCSS: 1.OA.C.6
9 - 5 =
1. 2
2. 4
3. 9
4. 14
Grade 1 Addition CCSS: 1.OA.C.6
4 + 5 =
1. 9
2. 4
3. 6
4. 3
Grade 1 Addition CCSS: 1.OA.C.6
Which equals 10?
1. $8 + 1$
2. $4 + 2$
3. $7 + 3$
4. $5 + 4$
Grade 1 Addition CCSS: 1.OA.C.6
5 + 8
1. 13
2. 3
3. 12
4. 40
Grade 1 Addition CCSS: 1.OA.C.6
Grade 1 Addition CCSS: 1.OA.C.6
Grade 1 Addition CCSS: 1.OA.C.6
6 + 7
1. 13
2. 14
3. 8
4. 20
Grade 1 Subtraction CCSS: 1.OA.C.6
Grade 1 Subtraction CCSS: 1.OA.C.6
Grade 1 Addition CCSS: 1.OA.C.6
1 + 3 =
1. 2
2. 5
3. 4
4. 1
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