能简算的要简算.9-4.8÷6×50.5 （1.4×0.3+2.46）÷1.8 (2.5 ÷2+2÷2.5)×0.4

题目

能简算的要简算.9-4.8÷6×50.5 （1.4×0.3+2.46）÷1.8 (2.5 ÷2+2÷2.5)×0.4
3.71+3.71×7.4-8.4×3.71 1.2+8.8×1.25 16.2÷[64.8-(51.3-2.7)] 急,注意能简算的一定要简算

答案

3.71+3.71X7.4-8.4X3.71
=3.71X1+3.71X7.4-8.4X3.71
=3.71X(1+8.4-7.4)
=3.71X2
=7.42
1.2+8.8×1.25
=1.2+(8+0.8)x1.25
=1.2+(8x1.25+0.8x1.25)
=1.2+(10+1)
=12.2
16.2÷[64.8-(51.3-2.7)]
=16.2÷(64.8-51.3+2.7)
=16.2÷16.2
=1