number-bonds/addition-bonds/expert · 套题 81
8 problems
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1
Complete the number bond: 4 __ + 1
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2
Number bond: 6 3 + ?
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3
3 2 + __
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4
Complete the number bond: 5 4 + __
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5
Number bond: 5 4 + ?
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6
Number bond: 9 7 + ?
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7
Complete the number bond: 8 7 + __
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8
4 3 + __
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