Question

9. Calculați utilizând factorul comun:
a) 3-(-55)+3-50; c) 10-300+10-(-200);
b) (-8)-60+(-8)-40; d) (-28) (-40)+(-28)-20 ​

Answer 1

Explicație pas cu pas:

a) 3(1 + 1) + 5(11 - 10) = 6 + 5 = 11

b) 4(-2 - 15 - 2 - 10) = 4 × -29 = -116

c) 10(1 - 30 + 1 + 20) = -80

d) -28(1 + 1) + 20(-2 -1) = -56 - 60 = -116

Answer 2

Răspuns:

a) 3-(-55)+3-50=3+55+3-50=3×(1+1)+5(11-10)=6+5=11

b) (-8)-60+(-8)-40=-8-60-8-40=4×(-2-15-2-10)=4×(-29)= -116

c) 10-300+10-(-200)=10-300+10+200=10×(1-30+1+20)= -80

d) (-28) ?(-40)+(-28)-20 ​???