Question

10640÷560=
504900÷4900=
213×105=
49×215=

Answer 1

分析：根据乘、除法的计算法则计算．

解答：10640÷560
=10640÷（80×7）
=10640÷80÷7
=19，
 504900÷4900=103…200
                    1 0 3
        4900

5 0 4 9 0 0

              4 9 0 0
            _________________
                1 4 9 0 0
                1 4 7 0 0
           _________________
                    2 0 0


213×105=22365
          2 1 3
×1 0 5
__________________
        1 0 6 5
      2 1 3
___________________
      2 2 3 6 5

49×215=10535
          4 9
×2 1 5
__________________
        2 4 5
        4 9
      9 8
_________________
    1 0 5 3 5

点评：乘除法中难度较大并且容易出错的题．