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题型:填空题 题类:常考题 难易度:普通
20以内的进位加法和退位减法484(10题)
6{#blank#}1{#/blank#}7=13
{#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} = {#blank#}4{#/blank#} (本)
( )+ 5 = 9 1 +( ) = 7 4 +( ) = 8
3 +( ) = 8 ( )+ 4 = 6 ( )+ 4 = 7
3+9{#blank#}1{#/blank#}9+4 17-4{#blank#}2{#/blank#}16-8
20{#blank#}3{#/blank#}9+9 8+4{#blank#}4{#/blank#}7+5
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