题型：填空题 题类：常考题 难易度：容易
乘法分配律(含用乘法分配律简算) 4933 10
(15+34)×7=157347
A．+ B．-
C．× D．÷
21×13
× | 20 | 1 |
10 | {#blank#}1{#/blank#} | {#blank#}2{#/blank#} |
3 | {#blank#}3{#/blank#} | {#blank#}4{#/blank#} |
{#blank#}5{#/blank#}
12×24
× | 10 | 2 |
20 | {#blank#}6{#/blank#} | {#blank#}7{#/blank#} |
4 | {#blank#}8{#/blank#} | {#blank#}9{#/blank#} |
{#blank#}10{#/blank#}
试题篮
