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=50072÷8=9570+100=67042÷8=5…28×7=5649+21=70130+30=160故答案为:100,700,7,500,9,670,5…2,56,70,160.