Tính giá trị biểu thức sau:
10/3 . 21/5 + 21/5 .2/3 + 10/3 – 8/5 +14/5 . 2/3
HELP ME
Tính giá trị biểu thức sau: 10/3 . 21/5 + 21/5 .2/3 + 10/3 – 8/5 +14/5 . 2/3 HELP ME
By Lydia
By Lydia
Tính giá trị biểu thức sau:
10/3 . 21/5 + 21/5 .2/3 + 10/3 – 8/5 +14/5 . 2/3
HELP ME
`10/3 . 21/5 + 21/5 . 2/3 + 10/3 – 8/5 + 14/5 . 2/3`
`= 21/5 ( 10/3 + 2/3 ) + 10/3 – 8/5 + 14/5 . 2/3`
`= 21/5 . 4 + 10/3 – 8/5 + 14/5 .2/3`
`= 84/5 + 10/3 – 8/5 + 28/15`
`= 84.3 + 10.5 -8.3 + 28 / 15`
`= 252 + 50 – 24 + 28 / 15`
`= 306/15 = 105/5`
10/3 . 21/5 + 21/5 . 2/3 + 10/3 – 8/5 + 14/5 . 2/3
= 21/5 ( 10/3 + 2/3 ) + 10/3 – 8/5 + 14/5 . 2/3
= 21/5 . 4 + 10/3 – 8/5 + 14/5 .2/3
= 84/5 + 10/3 – 8/5 + 28/15
= 84.3 + 10.5 -8.3 + 28 / 15
= 252 + 50 – 24 + 28 / 15
= 306/15 = 105/5