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题型:解决问题 题类:常考题 难易度:普通
20以内的进位加法和退位减法494(10题)
{#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#}={#blank#}4{#/blank#}
3-0= 2-2= 3-2= 1+4=
10-3= 4-1= 2+0= 4-2=
1+1= 6+8= 0+1= 15-3= 6+l=
2+9= 6-3= 7-4=
10+2= 9-8= 5+14= 19-6=
6+{#blank#}1{#/blank#}=9 {#blank#}2{#/blank#}+5=13 {#blank#}3{#/blank#}+{#blank#}4{#/blank#}=11
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