Câu hỏi của Bùi Xuân An

Question

tính hợp lí a)232 - (581 + 132 - 331)b)[12 + (-57)] - [-57 - (-12)

⭐Hannie⭐ · Accepted Answer

`a, 232 - ( 581 + 132 -331)``= 232 - 581 - 132 +331``= (232-132) +(-581 + 331)``= 100 -250``=-150``b, [12+ (-57)] - [-57-(-12)]``= 12+ (-57) - (-57+12)``= 12+ (-57) + 57 -12``= (12-12) + (-57+57)``= 0+0``=0` Câu trả lời: `a, 232 - ( 581 + 132 -331)``= 232 - 581 - 132 +331``= (232-132) +(-581 + 331)``= 100 -250``=-150``b, [12+ (-57)] - [-57-(-12)]``= 12+ (-57) - (-57+12)``= 12+ (-57) + 57 -12``= (12-12) + (-57+57)``= 0+0``=0`

Revival · Answer

`a)232-(581+132-331)`

`=232-581-132+331`

`=(232-132)-(581-331)`

`=100-250`

`=-150`

`b)[12+(-57)]-[-57-(-12)]`

`=(12-57)-(-57+12)`

`=12-57+57-12`

`=(12-12)-(57-57)`

`=0-0`

`=0`

Câu trả lời: `a)232-(581+132-331)`