number-bonds/addition-bonds/hard · 套题 75
8 problems
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1
Number bond: 8 4 + ?
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2
Number bond: 4 1 + ?
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3
Complete the number bond: 5 2 + __
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4
2 1 + __
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5
Number bond: 5 4 + ?
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6
3 __ + 1
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7
7 4 + __
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8
Number bond: 10 8 + ?
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