脱式计算（能用简便方法的就用简便方法计算）0.45×1.32+20.55×1.327.29÷0.9÷0.098×13.01×1.259×5.4÷0.09．

Question

脱式计算（能用简便方法的就用简便方法计算）
0.45×1.32+20.55×1.32               
7.29÷0.9÷0.09
8×13.01×1.25                      
9×5.4÷0.09．

Answer 1

（1）0.45×1.32+20.55×1.32  
=（0.45+20.55）×1.32 
=21×1.32
=27.72
              
（2）7.29÷0.9÷0.09
=8.1÷0.09
=90

（3）8×13.01×1.25   
=（8×1.25）×13.01   
=10×13.01
=130.1
                 
（4）9×5.4÷0.09
=9÷0.09×5.4
=100×5.4
=540