2+4/5:3/4 2-5/8:4/3 3: 4/8 :5/3 5x6/3:4/6 2+4/5x3/4 2-5/8x4/3 3: 4/8 x5/3 5x6/3x4/6 2+4/5+3/4 2-5/8+4/3 3: 4/8 +5/3 5x6/3+4/6 2+4/5-3/4 2-5/8-4/3 3: 4/8 -5/3 5x6/3-4/6 4/5 +2 :3/4 5/8-2 :4/3 4/8 :3 :5/3 6/3x5 :4/6 6/15 + 5/9 :3

`2 + 4/5 -: 3/4`

`= 2 + 4/5 xx 4/3`

`= 2 + 16/15`

`= 46/15`

`---`

`2 - 5/8 -: 4/3`

`= 2 - 5/8 xx 3/4`

`= 2 - 15/32`

`= 49/32`

`---`

`3 -: 4/8 -: 5/3`

`= 3 xx 8/4 -: 5/3`

`= 6 -: 5/3`

`= 6 xx 3/5`

`= 18/5`

`---`

`5 xx 6/3 -: 4/6`

`= 10 -: 4/6`

`= 10 xx 6/4`

`= 15`

`---`

`2 + 4/5 xx 3/4`

`= 2 + 3/5`

`= 13/5`

`---`

`2 - 5/8 xx 4/3`

`= 2 - 5/6`

`= 7/6`

`---`

`3 -: 4/8 xx 5/3`

`= 3 xx 8/4 xx 5/3`

`= 6 xx 5/3`

`= 10`

`---`

`5 xx 6/3 xx 4/6`

`= 10 xx 4/6`

`= 20/3`

`---`

`2 + 4/5 + 3/4`

`= 14/5 + 3/4`

`= 71/20`

`---`

`2 - 5/8 + 4/3`

`= 11/8 + 4/3`

`=  65/24`

`---`

`3 -: 4/8 + 5/3`

`= 3 xx 8/4 + 5/3`

`= 6 + 5/3`

`= 23/3`

`---`

`5 xx 6/3 + 4/6`

`= 10 + 4/6`

`= 32/3`

`---`

`2 + 4/5 - 3/4`

`= 14/5 - 3/4`

`= 41/20`

`---`

`2 - 5/8 - 4/3`

`= 11/8 - 4/3`

`= 1/24`

`---`

`3 -: 4/8 - 5/3`

`= 3 xx 8/4 - 5/3`

`= 6 - 5/3`

`= 13/3`

`---`

`5 xx 6/3 - 4/6`

`= 10 - 4/6`

`= 28/3`

`---`

`4/5 + 2 -: 3/4`

`= 4/5 + 2 xx 4/3`

`= 4/5 + 8/3`

`= 52/15`

`---`

`5/8 - 2 -: 4/3`

`= 5/8 - 2 xx 3/4`

`= 5/8 - 3/2`

`= - 7/8`

`---`

`4/8 -: 3 -: 5/3`

`= 4/8 xx 1/3 -: 5/3`

`= 1/6 -: 5/3`

`= 1/6 xx 3/5`

`= 1/10`

`---`

`6/3 xx 5 -: 4/6`

`= 10 -: 4/6`

`= 10 xx 6/4`

`= 15`

`---`

`6/15 + 5/9 -: 3`

`= 6/15 + 5/9 xx 1/3`

`= 6/15 + 5/27`

`= 79/135`

`#`Nguyencanhthinh`#`

`*** Hoidap247`

Đáp án `+` Giải thích các bước giải`:`

`2 + 4/5 : 3/4`

`= 2 + 4/5 xx 4/3`

`= 2 + 16/15`

`= 46/15`

`2 - 5/8 : 4/3`

`= 2 - 5/8 xx 3/4`

`= 2 - 15/32`

`= 49/32` 

`3 : 4/8 : 5/3`

`= 3 xx 8/4 : 5/3`

`= 6 : 5/3`

`= 6 xx 3/5`

`= 18/5`

`5 xx 6/3 : 4/6`

`= 10 : 4/6`

`= 10 xx 6/4`

`= 15` 

`2 + 4/5 xx 3/4`

`= 2 + 3/5`

`= 13/5` 

`2 - 5/8 xx 4/3`

`= 2 - 5/6`

`= 7/6` 

`3 : 4/8 xx 5/3`

`= 3 xx 8/4 xx 5/3`

`= 6 xx 5/3` `= 10`

`5 xx 6/3 xx 4/6`

`= 10 xx 4/6`

`= 20/3` 

`2 + 4/5 + 3/4`

`= 14/5 + 3/4`

`= 71/20` 

`2 - 5/8 + 4/3`

`= 11/8 + 4/3`

`=  65/24` 

`3 : 4/8 + 5/3`

`= 3 xx 8/4 + 5/3`

`= 6 + 5/3`

`= 23/3`

`5 xx 6/3 + 4/6`

`= 10 + 4/6`

`= 32/3`

`2 + 4/5 - 3/4`

`= 14/5 - 3/4`

`= 41/20`

`2 - 5/8 - 4/3`

`= 11/8 - 4/3`

`= 1/24` 

`3 : 4/8 - 5/3`

`= 3 xx 8/4 - 5/3`

`= 6 - 5/3`

`= 13/3`

`5 xx 6/3 - 4/6`

`= 10 - 4/6`

`= 28/3`

`4/5 + 2 : 3/4`

`= 4/5 + 2 xx 4/3`

`= 4/5 + 8/3`

`= 52/15` 

`5/8 - 2 : 4/3`

`= 5/8 - 2 xx 3/4`

`= 5/8 - 3/2`

`= - 7/8` 

`4/8 : 3 : 5/3`

`= 4/8 xx 1/3 : 5/3`

`= 1/6 : 5/3`

`= 1/6 xx 3/5`

`= 1/10` 

`6/3 xx 5 : 4/6`

`= 10 : 4/6`

`= 10 xx 6/4`

`= 15`

`6/15 + 5/9 : 3`

`= 79/135`

`= 6/15 + 5/9 xx 1/3`

`= 6/15 + 5/27`

$\color{black}{\text{#Mpro}}$