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题型:计算题 题类:常考题 难易度:普通
20以内的进位加法和退位减法506(10题)
{#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} = {#blank#}4{#/blank#}(条)
6+8={#blank#}1{#/blank#}
2+5= 40+3= 10+70= 17-2= 14-6=
80-30= 36-5= 14-8= 9+5= 32+2=
70+19= 20+80= 31+15= 52-12= 100-40=
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