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题型:填空题 题类:常考题 难易度:容易
20以内的进位加法和退位减法520(10题)
8+10=
{#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} = {#blank#}4{#/blank#}
10+5= 10+3= 10+0= 14+5=
10+10= 19-6= 13+6= 16-6=
15+3= 16-4= 15+4= 16-6=
13+4= 16-2= 17-5= 19-8=
15+2= 13+2= 18-8= 17-10=
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