number-bonds/addition-bonds/medium · 套题 40
7 problems
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1
Number bond: 2 + 1
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2
Number bond: 4 + 3
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3
Complete the number bond: 9 5 + __
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4
Complete the number bond: 4 2 + __
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5
Complete the number bond: 7 __ + 2
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6
2 __ + 1
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7
Number bond: 2 1 + ?
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