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用简便方法计算下面各题.4.65-2.55-1.452.5×32×1.250.36×2.5+0.64×2.5+2.5201×6.5.

题目详情
用简便方法计算下面各题.
4.65-2.55-1.45                 
2.5×32×1.25
0.36×2.5+0.64×2.5+2.5         
201×6.5.
▼优质解答
答案和解析
(1)4.65-2.55-1.45
=4.65-(2.55+1.45)
=4.65-4
=0.65

(2)2.5×32×1.25
=(2.5×4)×(1.25×8)
=10×10
=100

(3)0.36×2.5+0.64×2.5+2.5
=(0.36+0.64+1)×2.5+
=2×2.5
=5

(4)201×6.5
=(200+1)×6.5
=200×6.5+1×6.5
=1300+6.5
=1306.5