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脱式计算能简算的要简算14.64+3.7×2.84.8×7.1+4.8×2.93.6×20117.5÷0.25×17+134×0.8×12.5×2.5.

题目详情
脱式计算能简算的要简算
14.64+3.7×2.8       
4.8×7.1+4.8×2.9       
3.6×201
17.5÷0.25×17+13             
4×0.8×12.5×2.5.
▼优质解答
答案和解析
(1)14.64+3.7×2.8
=14.64+10.36
=25;

(2)4.8×7.1+4.8×2.9
=4.8×(7.1+2.9)
=4.8×10
=48;

(3)3.6×201
=3.6×(200+1)
=3.6×200+3.6×1
=720+3.6
=723.6;

(4)17.5÷0.25×17+13
=70×17+13
=1190+13
=1203;

(5)4×0.8×12.5×2.5
=(4×2.5)×(0.8×12.5)
=10×10
=100.