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题型:填空题 题类:常考题 难易度:容易
6的乘法口诀1761 10
30,36,42,45,48
30-15=5×{#blank#}1{#/blank#} 4×5={#blank#}2{#/blank#}-24
5×6= 5×5= 8×8= 6×8=
8×5= 3×4= 4×9= 9×3=
7×7= 2×8= 9×2= 6×9-7=
6+60= 23-4= 9×9+3= 8×7-6=
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