2 câu trả lời
D) (-13).34+(-87).34
=34.[(-13)+(-87)]
=34.(-100)
=-3400
e) (-50).68+(-68).(-250)
=68.(-50+250)
=68.200
=13600
`d)`
`( -13 ). 34 + ( -87 ). 34`
`= 34. ( -13 - 87 )`
`= 34. ( -100 )`
`= -3400`
D) (-13).34+(-87).34
=34.[(-13)+(-87)]
=34.(-100)
=-3400
e) (-50).68+(-68).(-250)
=68.(-50+250)
=68.200
=13600
`d)`
`( -13 ). 34 + ( -87 ). 34`
`= 34. ( -13 - 87 )`
`= 34. ( -100 )`
`= -3400`