number-bonds/addition-bonds/hard · 套题 38
8 problems
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1
9 4 + __
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2
Complete the number bond: 3 2 + __
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3
Number bond: 8 1 + ?
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4
6 3 + __
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5
Number bond: 2 + 1
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6
2 1 + __
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7
Complete the number bond: 8 3 + __
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8
Number bond: 6 + 5
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