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题型:填空题 题类:常考题 难易度:普通
混合运算(乘加、乘减、除加、除减两步计算式题)2861 10
①21+23 ②41+20 ③45-30 ④29+20 ⑤86-17 ⑥100-40-12
{#blank#}1{#/blank#}
21+28+{#blank#}1{#/blank#}=100,31+38+{#blank#}2{#/blank#}=100
22+28+{#blank#}3{#/blank#}=100,32+38+{#blank#}4{#/blank#}=100
27+21+{#blank#}5{#/blank#}=100,37+31+{#blank#}6{#/blank#}=100
78-42-13{#blank#}1{#/blank#}78-(42+13) 65-29-13{#blank#}2{#/blank#}65-(29-13)
36-(25+11){#blank#}3{#/blank#}10 75-60-10{#blank#}4{#/blank#}5
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