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题型:填空题 题类:常考题 难易度:困难
一年级 1~~5的减法124
+ =2 - =3
= =
4-{#blank#}1{#/blank#}=0
3+1=
{#blank#}1{#/blank#}
{#blank#}2{#/blank#}
{#blank#}3{#/blank#}
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