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题型:单选题 题类:常考题 难易度:容易
一年级 20以内的退位减法813
16-9=( )
11-9=1+{#blank#}1{#/blank#} 13-9=3+{#blank#}2{#/blank#}
14-9-5={#blank#}3{#/blank#} 18-9-1={#blank#}4{#/blank#}
8+{#blank#}1{#/blank#}=12 9+{#blank#}2{#/blank#}=11 12-{#blank#}3{#/blank#}=6
5+{#blank#}4{#/blank#}=18 {#blank#}5{#/blank#}-4=8 {#blank#}6{#/blank#}+ 8 =17
11-4= 12-7= 6+8= 16-8=
15-9= 14-5= 12-3= 13-6=
12-8= 9+7= 7+6= 15-8=
17-8-3= 15-9+6= 14-5+3=
7+6-9= 8+3-5= 9+4-8=
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