下面的简便计算对吗?把不对的改正过来.
(1)1.25×(8+0.8)改正:______
=1.25×8+0.8
=10+0.8
=10.8______
(2)125×4.8×2.5 改正:______
=125×0.8+4×2.5
=100+10
=110______.
网友回答
解:(1)1.25×(8+0.8)
=1.25×8+0.8,
=l0+0.8,
=10.8.×.
改正为:
1.25×(8+0.8)
=1.25×8+1.25×0.8,
=10+1,
=11.
(2)125×4.8×2.5
=125×0.8+4×2.5,
=lOO+10,
=1lO.×.
改正:
125×4.8×2.5
=(125×0.8)×(6×2.5),
=100×15,
=1500.
故