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题型:填空题 题类:常考题 难易度:普通
20以内的进位加法和退位减法565(10题)
7 =
5 =
5=
12 =
{#blank#}1{#/blank#}- {#blank#}2{#/blank#} = {#blank#}3{#/blank#}
{#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} = {#blank#}4{#/blank#}
12{#blank#}1{#/blank#}4=8
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