Tính : `A=-5/2:3/4+2/3` `B=1/2-(2/3+1/10)` `C=(11/12:33/16).3/5` Nhanh nhé 60₫ 10/07/2021 Bởi Allison Tính : `A=-5/2:3/4+2/3` `B=1/2-(2/3+1/10)` `C=(11/12:33/16).3/5` Nhanh nhé 60₫
Đáp án: A= -8/3 B= -8/30 C= -12/45 Giải thích các bước giải: A= -5/2 : 3/4 + 2/3 = -5/2 . 4/3 + 2/3 = -20/6 + 2/3 = -10/3 + 2/3 = -8/3 B= 1/2 – (2/3 + 1/10) = 1/2 – 2/3 – 1/10 = 5/10 – 1/10 – 2/3 = 4/10 – 2/3 = 12/30 – 20/30 = -8/30 C= (11/12 : 33/16) . -3/5 = (11/12 . 16/33) . -3/5 = 176/396 . -3/5 = 4/9 . -3/5 = -12/45 = -4/15 Bình luận
`A = -5/2 : 3/4 + 2/3` `= -5/2 . 4/3 + 2/3` `= -10/3 + 2/3` `= -8/3` `B= 1/2 – ( 2/3 + 1/10)` `= 1/2 – 2/3 – 1/10` `= ( 1/2 – 1/10) – 2/3` `= 2/5 – 2/3` `=6/15` – `10/15` `= 6/15 + -10/15` `= -4/15` `C = ( 11/12 : 33/16) . 3/5` `= ( 11/12 . 16/33) . 3/5` `= 4/9 . 3/5` `= 4/15` Bình luận
Đáp án:
A= -8/3
B= -8/30
C= -12/45
Giải thích các bước giải:
A= -5/2 : 3/4 + 2/3
= -5/2 . 4/3 + 2/3
= -20/6 + 2/3
= -10/3 + 2/3
= -8/3
B= 1/2 – (2/3 + 1/10)
= 1/2 – 2/3 – 1/10
= 5/10 – 1/10 – 2/3
= 4/10 – 2/3
= 12/30 – 20/30
= -8/30
C= (11/12 : 33/16) . -3/5
= (11/12 . 16/33) . -3/5
= 176/396 . -3/5
= 4/9 . -3/5
= -12/45
= -4/15
`A = -5/2 : 3/4 + 2/3`
`= -5/2 . 4/3 + 2/3`
`= -10/3 + 2/3`
`= -8/3`
`B= 1/2 – ( 2/3 + 1/10)`
`= 1/2 – 2/3 – 1/10`
`= ( 1/2 – 1/10) – 2/3`
`= 2/5 – 2/3`
`=6/15` – `10/15`
`= 6/15 + -10/15`
`= -4/15`
`C = ( 11/12 : 33/16) . 3/5`
`= ( 11/12 . 16/33) . 3/5`
`= 4/9 . 3/5`
`= 4/15`