Đáp án:
↓↓
Giải thích các bước giải:
Câu 1:
`b)`
`6 . (-35) . 143/-15 . (-21) . 132`
`= [6 . (-21)] . [(-35) . 143/-15] . 132`
`=-126 . 1001/3 .132`
`= -42042 . 132`
`=-5549544`
`c)`
` 165.186+165 . (-36)/150. 188-150 .23`
`= 165 . (186 - 150) . (-36)/150 . 188 . 23`
`= 165 . 36 . (-36)/150 . 188 . 23`
`= 165 . -1/150 . 188 . 23`
`=-11/10 . 188 . 23`
`=-1034/5 . 23`
`= -23782/5 `
Câu 2:
`a)`
` 8/9-(1/3-5/9)`
`= 8/9 - 1/3 + 5/9`
`= (8/9 + 5/9) - 3/9`
`=13/9 - 3/9`
`= 10/9`
`b)`
`5/6-4/-9.(-3/4)`
`= 5/6 - 1/3`
`= 5/6 - 2/6`
`=1/2`
`c)`
`-1+5/-7:5/14`
`= -1 + 5/-7 . 14/5`
`= -1 + -2`
`= -3`
`d)`
`(3-6/3) :(-16/21)`
`= (9/3 - 6/3) . (-21/16)`
`=1 . (-21/16)`
`=-21/16.`
