Question

1/ Tính nhanh:

a) (-19).315 - 315.81

b) (-192).(375+1) +375.192

c) 35.(-19) + 19.(-65)

d) (135-1). 497 - 497.135

2/ Viết dưới dạng ở 1 lũy thừa

a) (- 4). (-4). (4). (-4). 5. 5. 5. (-20). 5

b) 2.2.2.(-4).(-4).(-4)

( Các bn âi iúp mk zs ai nhah mk tick cho)

Answer 1

\(\left(-19\right)\cdot315-315\cdot81\\ =315\cdot\left(-19-81\right)\\ =315\cdot\left(-100\right)\\ =-31500\\ \left(-192\right)\cdot\left(375+1\right)+375\cdot192\\ =\left(-192\right)\left(375+1-375\right)\\ =\left(-192\right)\cdot1\\ =-192\\ 35\cdot\left(-19\right)+19\cdot\left(-65\right)\\ =\left(-19\right)\cdot\left(35+65\right)\\ =\left(-19\right)\cdot100\\ =-1900\\ \left(135-1\right)\cdot497-497\cdot135\\ =497\cdot\left(135-1-135\right)\\ =497\cdot\left(-1\right)\\ =-497\)

Answer 2

1

a) (-19). 315-315.81

=315 .(-19-81)=315. (-100)

=-31500

b)(-192).(375+1)+375.192

=-192.375+375.192=375(-192+192)=375.0=0

c)35.(-19)+19.(-65)=35.(-19)+(-19).65=(-19).100=-1900

d)(135-1).497-497.135= 134.497-497.135=497(134-135)=497.(-1)=-497

2

a)(-4)(-4)(-4)(-4).5.5.5.(-20).5=(-4)(-4)(-4)(-4).5.5.5.(-4).5.5=(-4)^5.5^5= (-4.5)^5=(-20)^5

b)2.2.2.(-4)(-4)(-4)=2^3.(-4)^3=(2.-4)^3=(-8)^3