题型:解决问题 题类:常考题 难易度:困难
7的乘法口诀1820 8
① 2×5+5={#blank#}1{#/blank#} | ② 3×4+2={#blank#}2{#/blank#} | ③ 56-7-7={#blank#}3{#/blank#} |
④ 3×6-6={#blank#}4{#/blank#} | ⑤ 4×3+3={#blank#}5{#/blank#} | ⑥ 5×5-5={#blank#}6{#/blank#} |
{#blank#}1{#/blank#}×{#blank#}2{#/blank#}=18 | {#blank#}3{#/blank#}×{#blank#}4{#/blank#}=18 |
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