![](https://rs.olm.vn/images/avt/0.png?1311)
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a, [ 13-17 ].[-10]+[-7]0
=-4.[-10]+1
=40+1
=41
b, 72.[28-49] + 28.[-49-72]
=72.[-21]+28.[-121]
=-1512+[-3388]
=-4900
c, -65.[87-17] - 87.[17-65]
=-65.70-87.[-48]
=4550-[-4276]
=8726
d, -23.63+23.21-58.23
=23.(-63)+23.21-58.23
=23.(-63+23-58)
=23.(-40-58)
=23.(-98)
=-2254
e, 25.134+25.[-34]
=25.[134+(-34)]
=25.100
=2500
![](https://rs.olm.vn/images/avt/0.png?1311)
− 65 ( 87 − 17 ) − 87 ( 17 − 65 ) = − 65.87 + 65.17 − 87.17 + 87.65 = 87.65 − 65.87 + 17 65 − 87 = 0 + 17. − 22 = − 374.
![](https://rs.olm.vn/images/avt/0.png?1311)
a)
(-12)(-13)+13(-22) = 12.13 - 13.22 = 13(12-22)=13.(-10)=-130
b) 15(-14) +15(-6) + (-20).25 = 15[(-14)+(-6)]+(-20).25=15.(-20)+(-20).25=(-20)(15+25)=-20.40=-800
c) -65.(87-17)-87(17-65) =
a)(-12).(-13)+13.(-22)=12.13+13.(-22)=13.[12+(-22)]=13.(-10)=-130
b)15.(-14)+15.(-6)+(-20).25=15.[(-14)+(-6)]+(-20).25=15.(-20)+(-20).25=(-20).(15+25)=(-20).40=-800
c)-65.(87-17)-87.(17-65)=-65.87-(-65).17-87.17+87.65
=-65.87+65.17-87.17+87.65
=[(-65)+65].87+(65-87).17
=0.87+(-22).17
=0+(-374)=-374
![](https://rs.olm.vn/images/avt/0.png?1311)
-65.(87 - 17) - 87.(17 - 65) = 65.(17 - 87) - 87.17 + 87.65 = 65.17 - 65.87 + 65.87 - 87.17 = (65 - 87).17 = -22.17 = -374
![](https://rs.olm.vn/images/avt/0.png?1311)
a) ( 135 − 35 ) . ( − 37 ) + 37 ( − 41 − 59 ) = − 100.37 + 37 − 100 = 37 − 100 − 100 = 37 − 200 = − 7400.
b) − 65 ( 87 − 17 ) − 87 ( 17 − 65 ) = − 65.87 + 65.17 − 87.17 + 87.65 = 87.65 − 65.87 + 17 65 − 87 = 0 + 17. − 22 = − 374.
c) 3 ( − 2 ) − ( − 8 ) . ( − 7 ) − ( − 2 ) . ( − 5 ) = − 6 + 8 . − 7 + 2 = 2. − 7 + 2 = − 12
![](https://rs.olm.vn/images/avt/0.png?1311)
-65 . 87 - (-65 . 17) - 87.17 + 87.65
= -65 . 87 + 65 . 17 - 87 . 17 + 87 . 65
= 87 . (-65 + 65) + 17 . (65 - 87)
= 87 . 0 + 17 . (-22)
= 0 + (-374)
= -374
a, - 23 . 37 - 23. 13 + 23 . 150
= 23 . ( - 37 - 13 + 150 )
= 23 . 100
= 2300
b, - 65 . ( 87 - 17 ) - 87 . ( 17 - 65 )
= - 65 . 70 - 87 . ( - 48 )
= - 4550 - ( - 4176 )
= - 374
Tính hợp lí :
a) -23.37-23.13+23.150
= -23.37-23.13-23.(-150)
=-23.[37-13-(-150)]
=-23.174
=-4002
b) -65.(87-17) -87.(17-65)
=-65.60-87.(-48)
=3900-(-4176)
=8076