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题型:填空题 题类:常考题 难易度:容易
两位数减两位数(退位)1189(10题)
80-27=
29+{#blank#}1{#/blank#}=40
53+{#blank#}2{#/blank#}=70
48+{#blank#}3{#/blank#}=60
74+{#blank#}4{#/blank#}=90
先算: -6=
再算:40+ =
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