Question

scoateti factorul comun in afara parantezelor apoi calculati 2* 6+2 5+2 *9 5*10+5*3+7*5 2*8+8*3+5*8 3*10-3*4-3*2 9*20-9*6-7*9 8*6-3*8-8*2 10*7+10*2-10*5 7*8-6*7+7*4 2*100-75*2+11*2-2*4

Answer 1

2*6+2*5+2*9=2(6+5+9)=2*20=40
5*10+5*3+7*5=5*(10+3+7)=5*20=100
2*8+8*3+5*8=8*(2+3+5)=8*10=80
3*10-3*4-3*2=3*(10-4-2)=3*4=12
9*20-9*6-7*9=9*(20-6-7)=9*7=63
8*6-3*8-8*2=8*(6-3-2)=8*1=8
10*7+10*2-10*5=10*(7+2-5)=10*4=40
7*8-6*7+7*4=7*(8-6+4)=7*6=42
2*100-75*2+11*2-2*4=
2*(100-75+11-4)=2*32=64