题型：填空题 题类：常考题 难易度：普通
9的乘法口诀1874 10
|
8 × 9={#blank#}1{#/blank#} |
6 × 7 ={#blank#}2{#/blank#} |
5 × 4 ={#blank#}3{#/blank#} |
9 × 7 -7 ={#blank#}4{#/blank#} |
|
5 × 6 ={#blank#}5{#/blank#} |
4 × 9 ={#blank#}6{#/blank#} |
7 × 8 ={#blank#}7{#/blank#} |
6 × 9 + 9 ={#blank#}8{#/blank#} |
|
32-8 ={#blank#}9{#/blank#} |
40 + 28 ={#blank#}10{#/blank#} |
56 + 9 ={#blank#}11{#/blank#} |
67-40 + 21 ={#blank#}12{#/blank#} |
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