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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=
+ =20
- =1
={#blank#}1{#/blank#}
={#blank#}2{#/blank#}
2+3= 4+3= 9-6= 10-8=
7-4= 11+2= 15-3= 8-4=
15+3= 9-4= 10-5= 18-6=
3+3= 10-9= 17+2= 2+2=
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