A= 11/17+8/9-3/4+6/7-30/9

2 câu trả lời

Đáp án:

`A =` `\frac{11}{17}` + `\frac{8}{9}` - `\frac{3}{4}` + `\frac{6}{7}` - `\frac{30}{9}`

`A =` `(\frac{8}{9} - ` `\frac{30}{9}) +` `\frac{11}{17} - ` `\frac{3}{4} + ` `\frac{6}{7}`  

`A =` `-\frac{22}{9} + ` `\frac{359}{476}` 

`A =` `-\frac{10472}{4283}` + `\frac{3231}{4284}` 

`A =` `-\frac{7241}{4284}`

Đáp án:

`A = 11/17 + 8/9 - 3/4 + 6/7 - 30/9`

`A = ( 8/9 - 30/9 ) + ( 11/17 - 3/4 + 6/7 )`

`A = -22/9 + ( 308/476 - 357/476 + 408/476 )`

`A = -22/9 + 359/476`

`A = -10472/4284 + 3231/4284`

`A = -7241/4284`