Question

Tính 

a)-15-(-7)+13

b)47-(-15)+(-13)

c)-115+(-20)-(-11)

d)-2.(-4).(-5).6

e)11+(-113)-(-17)+78

g)2^3.(-5)^2.(-70)^2

Answer 1

a) -15 - (- 7) + 13 = -15 - -7 + 13

= -8 + 13

= 5

b) 47 - (-15) + (-13) = 47 - -15 + -13

= 62 + -13

= 49

c) -115 + (-20) - (-11) = -115 + -20 - -11

= -135 - -11

= 124

d) -2 . (-4) . (-5) . 6 = -2 . -4 . -5 . 6

= -8 . -5 . 6

= 40 . 6

= 240

e) 11 + (-113) - (-17) + 78 = 11 + -113 - -17 + 78

= -102 - -17 + 78

= -85 + 78

= -7

g) 2³ . (-5)² . (-70)² = 8 . -25 . -4900

= -200 . -4900 

= 980000

Answer 2

a)-15-(-7)+13=-15+8-13=-7+(-13)=-20

b)47-(-15)+(-13)=47+15+(-13)=62+(-13)=49

c)-115+(-20)-(-11)=-135+11=-124

d)-2*(-4)*(-5)*6=8*(-5)*6=(-40)*6=-240

e)11+(-113)-(-17)+78=-102+17+78=-85+78=-7

g)2^3*(-5)^2*(-70)^2=8*25*4900=200*4900=980000