Question

简便计算 1、(49.5÷7.5+49.5÷2.5)÷0.01 2、[3.25-3.25÷(10.3+2.2)]×0.1

要过程，答案要准确。

Answer 1

1、(49.5÷7.5+49.5÷2.5)÷0.01
=49.5÷7.5×（1+3）÷0.01
=6.6×4÷0.01
=26.4÷0.01
=2640

2、[3.25-3.25÷(10.3+2.2)]×0.1
=[3.25-3.25÷12.5]×0.1

=3.25×（1-2/25）×0.1
=3.25×23/25×0.1
=2.99×0.1
=0.299

Answer 2

1、(49.5÷7.5+49.5÷2.5)÷0.01
=（49.5÷15/2+49.5÷5/2）÷1/100
=(49.5×2/15+49.5×2/5）÷1/100
=[49.5×（2/15+2/5）]÷1/100
=49.5×8/15×100
=99/2×8/15×100
=2640
2、[3.25-3.25÷(10.3+2.2)]×0.1
=[3.25-3.25×2/25]×0.1
=3.25×（1-2/25）×0.1
=3.25×23/25×0.1
=13/4×23/25×1/10
=299/1000
=0.299