Question

Scoate factorul comun apoi calculeaza 7×8+2×7+10×7; 8×49+8×31-8×50;15×99+15×13-15×112; 25×13+25×8-25×11

Answer 1

7×8+2×7+10×7=7(8+2+10)= 7•20= 140
8×49+8×31-8×50= 8(49+31-50)=8• 30= 240
15×99+15×13-15×112= 15(99+13-112)= 15• 0= 0
25×13+25×8-25×11= 25(13+8-11)= 25• 10= 250

Answer 2

7×8+2×7+10×7 = 7 x (8 + 2 + 10) = 7 x 20 = 140

8×49+8×31-8×50 = 8 x (49 + 31 - 50) = 8 x 30 = 240

15×99+15×13-15×112 = 15 x ( 99 + 13 - 112) = 15 x 0 = 0

25×13+25×8-25×11 = 25 x (13 + 8 - 11) = 25 x 10 = 250