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题型:填空题 题类:常考题 难易度:困难
整十数加、减整十数1041(10题)
29+=30
38+=40
67+=70
72+=80
81+=90
52+=60
{#blank#}1{#/blank#} - {#blank#}2{#/blank#} = {#blank#}3{#/blank#}
20+7 = 30-20 = 90+9= 60-30 = 24+6 =
51+8= 7+83= 85-5 = 90-70= 45+20=
96-7 = 65+20= 39+8= 4+65=
18+50-7= 80-60+35= 90-(60+30)= 63-(76-70)=
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