\(a.\)

\(-\left(-315\right)+\left(-115\right)-105+25\)

\(315-115-105+25\)

\(=215\)

\(b.\)

\(888-\left(-333\right)-222+111\)

\(=888+333-222+111\)

\(=1110\)

\(c.\)

\(-97-15+44-35-12+98\)

\(=-17\)

[ ( 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

25.(32+47)-32.(25+47)

= 25.32 + 47.25 - 32.25 +47.32

= 32,(25-25) + 47.(25-32)

= 47.(-7)

= -329

=25.79-32.72

=1975-2304

=-329

25.(32+47)+32.(25-47)

= -(25.32+25.47)+(32.25-32.47)

= -25.32+32.47 + 32.25-32.47

= (-25.32+32.25)-(25.47+32.47)

= 0 - 47.(25+32)

= -47.57

= -2649

Đề:25.(32-47)-32.(25-47)

=25.(-15)-32.(-22)

=-375-(-704)

=329

Dấu . là nhân nha

\(25\cdot\left(32-47\right)-32\cdot\left(25-47\right)=25\cdot32-25\cdot47-32\cdot25+32\cdot47=\left(25\cdot32-32\cdot25\right)+\left(32\cdot47-25\cdot47\right)=0+47\cdot\left(32-25\right)\)

\(=47\cdot7=409\)

=-3720

đồ bấm máy tính ko chấp

1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31

+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+4

7+48+49+50-999-888-777-666-555-444-333-222-111= -3720

25.(32 + 47) - 32.(25 - 47)

= 25.32 + 25.47 - 32.25 - 32.47

= (25.32 - 32.25) + 25.47 - 32.47

= 0 + 47.(25 - 32)

= 47. (-7)

= -329

25.32+25.47-32.25+32.47

(25-25).32+25.47+32.47

0+25.47+32.47

(25+32).47

25.(32+47)-32.(25+47)

=25.79-32.72

=1975-2304

= -329