题目

先估一估商是几位数，再计算。548÷2=           524÷4=       819÷7=250÷2=           393÷3=       684÷6= 答案：548÷2= 商是三位数548÷2=2742 2  7  45  4  84  _     1  4     1  4      ⇁           8           8  _           0524÷4= 商是三位数524÷4=1314 1  3  15  2  44  _     1  2     1  2      ⇁           4           4  _           0819÷7= 商是三位数819÷7=1177 1  1  78  1  97  _     1  1        7      ⇁        4  9        4  9  _            0250÷2= 商是三位数 250÷2=1252 1  2  52  5  02  _        5        4      ⇁        1  0        1  0  _           0393÷3= 商是三位数393÷3=1313 1  3  13  9  33  _       9         9      ⇁           3           3  _           0684÷6= 商是三位数684÷6=1146 1  1  46  8  46  _        8        6      ⇁        2  4        2  4  _           0

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