简便运算47.8*9.9+4.78
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简便运算47.8*9.9+4.78
简便运算47.8*9.9+4.78
简便运算47.8*9.9+4.78
47.8*9.9+4.78
=4.78*99+4.78
=4.78*(99+1)
=4.78*100
=478
简便运算47.8*9.9+4.78
简便运算47.8*9.9+4.78
简便运算47.8*9.9+4.78
47.8*9.9+4.78
=4.78*99+4.78
=4.78*(99+1)
=4.78*100
=478