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题型:单选题 题类:常考题 难易度:容易
一年级 20以内的退位减法819
10= + = + = + = + = +
= (只)
{#blank#}4{#/blank#} {#blank#}5{#/blank#}
{#blank#}1{#/blank#}
{#blank#}2{#/blank#}
{#blank#}3{#/blank#}
{#blank#}4{#/blank#}
{#blank#}5{#/blank#}
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