Tính nhanh (768-39)-768 97.(1-235)+235.97 (-38).(-64)+38.36 19/10/2021 Bởi Eden Tính nhanh (768-39)-768 97.(1-235)+235.97 (-38).(-64)+38.36
a) (768-39)-768 =768−39−768 =(768−768)−39 =−39 b) 97.(1−235)+235.97 =97.(−234)+235.97 =(235−234).97 =97 c) (−38).(−64)+38.36 = 38.(64+36) =38.100 =3800 Bình luận
a)`(768-39)-768` `= 768-39-768` `= 768 – 768 – 39 ` `= 0-39` `=-39` b)`97.(1-235)+235.97` `= 97 . (-234) + 235 . 97 ` `= 97. ( 235 – 234 )` `= 97 . 1 ` `= 97` c) `(-38).(-64)+38.36` `= 2432 + 1368` `= 3800` Bình luận
a)
(768-39)-768
=768−39−768
=(768−768)−39
=−39
b)
97.(1−235)+235.97
=97.(−234)+235.97
=(235−234).97
=97
c)
(−38).(−64)+38.36
= 38.(64+36)
=38.100
=3800
a)`(768-39)-768`
`= 768-39-768`
`= 768 – 768 – 39 `
`= 0-39`
`=-39`
b)`97.(1-235)+235.97`
`= 97 . (-234) + 235 . 97 `
`= 97. ( 235 – 234 )`
`= 97 . 1 `
`= 97`
c) `(-38).(-64)+38.36`
`= 2432 + 1368`
`= 3800`