56.5乘以9.9加上56.5怎么简便计算

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56.5乘以9.9加上56.5怎么简便计算56.5乘以9.9加上56.5怎么简便计算56.5乘以9.9加上56.5怎么简便计算56.5*9.9+56.5=56.5*(9.9+1)=56.5*10.9=

56.5乘以9.9加上56.5怎么简便计算
56.5乘以9.9加上56.5怎么简便计算

56.5乘以9.9加上56.5怎么简便计算
56.5*9.9+56.5
=56.5*(9.9+1)
=56.5*10.9=56.5*10+56.5*0.9=615.85
抱歉之前看错了

56.5*9.9+56.5
=56.5*(9.9+1)
=56.5*(10+1+0.9)
=565+56.5+5.65
=627.15

56.5*9.9+56.5
=56.5*(9.9+1)
=56.5*(10+1+0.9)
=565+56.5+5.65
=627.15

56.9*(9.9+1)=56.9*10+56.9-56.9*0.1=569+56.9-5.69=620.21

56.5*9.9+56.5
=56.5*(9.9+1)
=56.5*(10+0.9)
=56.5*(10+1-0.1)
=565+56.5-5.65
=615.85

56.5x9.9+56.5
=56.5x(9.9+1)
=56.5x10.9
=56.5x(10+0.9)
=56.5x10+56.5x0.9
=565+56.5x(1-0.1)
=565+56.5x1-56.5x0.1
=565+56.5-5.65
=621.5-5.65
=615.85