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估算.83×21≈89×78≈562÷8≈358÷6≈29×41≈53×78≈406÷8≈523÷9≈

题目详情
估算.
83×21≈89×78≈562÷8≈358÷6≈
29×41≈53×78≈406÷8≈523÷9≈
估算.
83×21≈89×78≈562÷8≈358÷6≈
29×41≈53×78≈406÷8≈523÷9≈

83×21≈89×78≈562÷8≈358÷6≈
29×41≈53×78≈406÷8≈523÷9≈
83×21≈89×78≈562÷8≈358÷6≈29×41≈53×78≈406÷8≈523÷9≈83×21≈89×78≈562÷8≈358÷6≈83×21≈89×78≈562÷8≈358÷6≈29×41≈53×78≈406÷8≈523÷9≈29×41≈53×78≈406÷8≈523÷9≈
▼优质解答
答案和解析
83×21≈80×20=160089×78≈90×80=7200562÷8≈560÷8=70358÷6≈360÷6=60
29×41≈30×40=120053×78≈50×80=4000406÷8≈400÷5=80523÷9≈520÷10=52
83×21≈80×20=160089×78≈90×80=7200562÷8≈560÷8=70358÷6≈360÷6=6029×41≈30×40=120053×78≈50×80=4000406÷8≈400÷5=80523÷9≈520÷10=5283×21≈80×20=160089×78≈90×80=7200562÷8≈560÷8=70358÷6≈360÷6=6083×21≈80×20=160083×21≈80×20=160089×78≈90×80=720089×78≈90×80=7200562÷8≈560÷8=70562÷8≈560÷8=70358÷6≈360÷6=60358÷6≈360÷6=6029×41≈30×40=120053×78≈50×80=4000406÷8≈400÷5=80523÷9≈520÷10=5229×41≈30×40=120029×41≈30×40=120053×78≈50×80=400053×78≈50×80=4000406÷8≈400÷5=80406÷8≈400÷5=80523÷9≈520÷10=52523÷9≈520÷10=52