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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794
3 + {#blank#}1{#/blank#} = 12 {#blank#}2{#/blank#} + 5=14 5+ {#blank#}3{#/blank#} =12
7+ {#blank#}4{#/blank#} =11 5+ {#blank#}5{#/blank#} =11 6+ {#blank#}6{#/blank#} =13
( )+( )=( )
( )-( )=( )
13-7={#blank#}1{#/blank#}
15-5={#blank#}2{#/blank#}
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