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题型:单选题 题类:常考题 难易度:普通
整十数加、减整十数1064(10题)
{#blank#}1{#/blank#} - {#blank#}2{#/blank#} = {#blank#}3{#/blank#}
78-6=
81+5=
65-5=
87-9=
72+5-9=
3+80=
77-70=
40+30=
14-9=
10+7-8=
13-5=
90-80=
98-8=
13+20=
80-20+8=
20+80=
12+26=
55+20=
21+5=
13-9+20=
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