问题
解答题
用简便算法计算:
(1)25×32×125
(2)28×1111+9999×8.
答案
(1)25×32×125,
=(25×4)×(8×125),
=100×1000,
=100000;
(2)28×1111+9999×8,
=28×1111+1111×72,
=(28+72)×1111,
=100×1111,
=111100.
用简便算法计算:
(1)25×32×125
(2)28×1111+9999×8.
(1)25×32×125,
=(25×4)×(8×125),
=100×1000,
=100000;
(2)28×1111+9999×8,
=28×1111+1111×72,
=(28+72)×1111,
=100×1111,
=111100.