Đáp án:
` 2/3 = -5/12 = 8/12 ; -5/12 `
` 3/5 ; -1/7 = 21/35;-5/35 `
` (-3) , -2/9 = -27/9 , -2/9 `
` 9/36,4/24 = 1/4 , 1/6 = 6/24 , 4/24 `
`4/5,-5/8 = 32/40,25/40 `
` 8/15,-7/18,13/90 = 48/90 , -35/90,48/90`
` 7/30 , 13/60,-9/-40 = 28/120 ; 26/120; 27/120 `
Giải thích các bước giải:
` 2/3 = -5/12 = 8/12 ; -5/12 `
` 3/5 ; -1/7 = 21/35;-5/35 `
` (-3) , -2/9 = -27/9 , -2/9 `
` 9/36,4/24 = 1/4 , 1/6 = 6/24 , 4/24 `
`4/5,-5/8 = 32/40,25/40 `
` 8/15,-7/18,13/90 = 48/90 , -35/90,48/90`
` 7/30 , 13/60,-9/-40 = 28/120 ; 26/120; 27/120 `
