题型:填空题 题类:常考题 难易度:容易
7的乘法口诀1810 10
×7=21
9×9{#blank#}1{#/blank#}81 | 1×7{#blank#}2{#/blank#}8 |
①{#blank#}1{#/blank#}×8=56 | 4×{#blank#}2{#/blank#}=28 | 7×{#blank#}3{#/blank#}=14 |
②{#blank#}4{#/blank#}×5=5 | 5×{#blank#}5{#/blank#}=15 | {#blank#}6{#/blank#}×5=45 |
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