medium Set 20 Form Exercise

Complete the number bond: 13 = __ + 9

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Answer: 4

SubType
number-bonds
Total
13
KnownPart
9
MissingPart
4
Difficulty
normal

14 = __ + 8

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Answer: 6

SubType
number-bonds
Total
14
KnownPart
8
MissingPart
6
Difficulty
normal

Complete the number bond: 12 = __ + 3

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Answer: 9

SubType
number-bonds
Total
12
KnownPart
3
MissingPart
9
Difficulty
normal

18 = 15 + __

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Answer: 3

SubType
number-bonds
Total
18
KnownPart
15
MissingPart
3
Difficulty
normal

4 = __ + 1

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Answer: 3

SubType
number-bonds
Total
4
KnownPart
1
MissingPart
3
Difficulty
normal

Number bond: 3 = ? + 1

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Answer: 2

SubType
number-bonds
Total
3
KnownPart
1
MissingPart
2
Difficulty
normal

13 = 8 + __

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Answer: 5

SubType
number-bonds
Total
13
KnownPart
8
MissingPart
5
Difficulty
normal

4 = 3 + __

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Answer: 1

SubType
number-bonds
Total
4
KnownPart
3
MissingPart
1
Difficulty
normal