问题 解答题
口算:
75+25=
808-108=35÷5=730-230=
72÷8=570+100=42÷8=8×7=
49+21=130+30=
答案

75+25=100808-108=70035÷5=7730-230=500
72÷8=9570+100=67042÷8=5…28×7=56
49+21=70130+30=160
故答案为:100,700,7,500,9,670,5…2,56,70,160.

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