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![](https://rs.olm.vn/images/avt/0.png?1311)
\(a.\)
\(-\left(-315\right)+\left(-115\right)-105+25\)
\(315-115-105+25\)
\(=215\)
\(b.\)
\(888-\left(-333\right)-222+111\)
\(=888+333-222+111\)
\(=1110\)
\(c.\)
\(-97-15+44-35-12+98\)
\(=-17\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(888-\left(-333\right)-222+70\)
\(=888+\left(333-222\right)+70\)
\(=888+111+70\)
\(=999+70\)
\(=1069\)
\(-97-15+44-35-12+56\)
\(=\left(-97-15-35-12\right)+\left(44+56\right)\)
\(=-159+100\)
\(=-59\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a)
[(-13)+(-15)]+(-8)
= (-28)+(-8)
=-36
b)=390
c)=-297
d)=1130
![](https://rs.olm.vn/images/avt/0.png?1311)
a) =-36
b) =390
c) =-537
d) =1130
tik mik nha bn ha ji won
![](https://rs.olm.vn/images/avt/0.png?1311)
[ ( 9 - 18 ) + ( -17 ) ] + ( -15 )
= [ ( -9 ) + ( -17 ) ] + ( -15 )
= ( -26 ) + ( -15 )
= -41
666 - ( -442 ) - 100 - 88
= 666 + 442 - 100 - 88
= 1108 - 100 - 88
= 1008 - 88
= 920
- ( -315 ) + ( -115 ) - 105 + 25
= 315 + ( -115 ) - 105 + 25
= 200 - 105 + 25
= 95 + 25
= 120
888 - ( -333 ) - 222 + 70
= 888 + 333 - 222 + 70
= 1221 - 222 + 70
= 999 + 70
= 1069
![](https://rs.olm.vn/images/avt/0.png?1311)
a) [ (-13)+(-15)] + (-18)
= (-28) + (-18)
= -46
b) 500-(-200)-210-100
= 700 - 210 - 100
= 490 - 100
= 390
c) -(-129)+119-301+12
= 248 - 301 + 12
= (-53) + 12
= -41
d) 777-(-111)-(-222)+20
= 888 - (-222) + 20
= 1110 + 20
= 1130
![](https://rs.olm.vn/images/avt/0.png?1311)
a) [( - 13) + (-15 )] + (-8)
= -28 + (-8)
= -36
b) 500 - (-200) - 210 - 100
= 500 + 200 - 210 - 100
= 700 - 210 - 100
= 490 - 100
= 390
c) -(-129 ) + (-119 ) - 301 + 12
= 129 - 119 - 301 + 12
= 10 - 301 + 12
= -291 + 12
= -279
d) 777 - (- 111) - (-222) + 20
= 777 + 111 + 222 + 20
= 888 + 222 + 20
= 1110 + 20
= 1130
a) [( - 13) + (-15 )] + (-8)
= -28 + (-8)
= -36
b) 500 - (-200) - 210 - 100
= 500 + 200 - 210 - 100
= 700 - 210 - 100
= 490 - 100
= 390
c) -(-129 ) + (-119 ) - 301 + 12
= 129 - 119 - 301 + 12
= 10 - 301 + 12
= -291 + 12
= -279
d) 777 - (- 111) - (-222) + 20
= 777 + 111 + 222 + 20
= 888 + 222 + 20
= 1110 + 20
= 1130
![](https://rs.olm.vn/images/avt/0.png?1311)
a) = 888 + 333 - 222 + 70 = 999 + 70 = 1069
b) = 77 - 11*30 - 7*11 = -330
c) = -200 - 10*500 = -5200
d) = 25 * (19 + 9) +(20 - 1) * 30 = 25*4*7 + 600 - 30 = 700 + 600 - 30 = 1270
e) E = (2 - 4 - 6 + 8) + (10 - 12 - 14 + 16) + (18 - 20 - 22 + 24) + ...+ (1994 - 1996 - 1998 + 2000) = 0 + 0 + 0 + ...+ 0 = 0.
a) (-23)+(-25)+(-10)= -(23+25+10)= -58
b) =480
c)= -279
d) =1473