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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464(10题)
计算7+5时,因为7加得,所以把5分成和,7加得,10加得,所以7加5得.
8+{#blank#}1{#/blank#}={#blank#}2{#/blank#}
4+{#blank#}3{#/blank#}={#blank#}4{#/blank#}
8 + 4 = 7 + 5 = 7 + 6 = 7 + 8 = 6 + 8 =
5 + 7 = 6 + 7 = 8 + 7 = 7 + 7 = 7 + 9 =
2+9= 5+3= 6+10= 18-10=
5+9= 9-5= 8+4= 10-9=
8+8= 9+3= 15-5= 9+9=
13-13= 6+5= 9-6= 0+6=
4+( )=10 7+( )=9 ( )+5=10 ( )+6=9
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