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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510(10题)
8+3=
4+7= {#blank#}1{#/blank#} 3+9= {#blank#}2{#/blank#} 6+6= {#blank#}3{#/blank#} 5+7= {#blank#}4{#/blank#}
7+8= {#blank#}5{#/blank#} 9+3= {#blank#}6{#/blank#} 6+5= {#blank#}7{#/blank#} 5+9= {#blank#}8{#/blank#}
{#blank#}1{#/blank#} +5=12 6+{#blank#}2{#/blank#} =15 {#blank#}3{#/blank#} +8=17
{#blank#}4{#/blank#} +6=12 7+{#blank#}5{#/blank#} =17 {#blank#}6{#/blank#} +4=12
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