0.45×5.8+4.5×0.58的简便方法

0.45×5.8+4.5×0.58的简便方法
2024-11-22 22:38:45
推荐回答(3个)
回答1:

原式=0.45×5.8+(0.45*10)×0.58
=0.45*5.8+0.45*(10*0.58)
=0.45*5.8*2
=0.9*5.8
=(1-0.1)*5.8
=5.8-0.58
=5.22

回答2:

回答3:

=4.5*0.58+4.5*0.58
=2*4.5*0.58
=9*0.58
=5.22