Question

Scoateti factorul comun in afara parantezelor apoi calculati: 3•5+3•2; 4•10-4•6; 4•2+3•2; 9•6-4•6; 8•5+5•2; 10•7-7•3; 10•7+10•2-10•5; 7•8-6•7+7•4; 2•100-75•2+11•2-2•4

Answer 1

Răspuns:

3•5+3•2= 3•(5+2)= 3•7=21

4•10-4•6= 4•(10-6)= 4•4=16

4•2+3•2= 2•(4+3)= 2•7=14

9•6-4•6= 6•(9-4)= 6•5=30

8•5+5•2= 5•(8+2)= 5•10=50

10•7-7•3= 7•(10-3)= 7•7=49

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