thực hiện phép tính a) 5/7:-3/22-5/7:3/8 b) 5/7: (1/11- 5/22) – 5/7 :(1-5/8) 27/08/2021 Bởi Alaia thực hiện phép tính a) 5/7:-3/22-5/7:3/8 b) 5/7: (1/11- 5/22) – 5/7 :(1-5/8)
a) 5/7 : (-3/22) – 5/7 : 3/8 = 5/7.(-22/3) – 5/7.8/3 = 5/7.[(-22/3) – 8/3] = 5/7.(-10) = -50/7 Vậy 5/7 : (-3/22) – 5/7 : 3/8 = -50/7 b) 5/7 : (1/11 – 5/22) – 5/7 : (1 – 5/8) = 5/7 : (-3/22) – 5/7 : 3/8 = 5/7.[(-22/3) – 8/3] = 5/7.(-10) = -50/7 Vậy 5/7 : (1/11 – 5/22) – 5/7 : (1 – 5/8) = -50/7 Bình luận
a) 5/7:-3/22-5/7:3/8 =$\frac{-110}{21}$ -$\frac{40}{21}$ =$\frac{-50}{7}$ b) 5/7: (1/11- 5/22) – 5/7 :(1-5/8) =5/7:(-3/22)-5/7:3/8 =$\frac{-110}{21}$ -$\frac{40}{21}$ =$\frac{-50}{7}$ Bình luận
a) 5/7 : (-3/22) – 5/7 : 3/8
= 5/7.(-22/3) – 5/7.8/3
= 5/7.[(-22/3) – 8/3]
= 5/7.(-10)
= -50/7
Vậy 5/7 : (-3/22) – 5/7 : 3/8 = -50/7
b) 5/7 : (1/11 – 5/22) – 5/7 : (1 – 5/8)
= 5/7 : (-3/22) – 5/7 : 3/8
= 5/7.[(-22/3) – 8/3]
= 5/7.(-10)
= -50/7
Vậy 5/7 : (1/11 – 5/22) – 5/7 : (1 – 5/8) = -50/7
a) 5/7:-3/22-5/7:3/8
=$\frac{-110}{21}$ -$\frac{40}{21}$
=$\frac{-50}{7}$
b) 5/7: (1/11- 5/22) – 5/7 :(1-5/8)
=5/7:(-3/22)-5/7:3/8
=$\frac{-110}{21}$ -$\frac{40}{21}$
=$\frac{-50}{7}$