Question

calculeaza produsele dupa model 3ori 7=5ori7-2ori 7 porbind de la a) imultirea cu 5 b) inmultirea cu 10 c) inmultirea cu 2

Answer 1

3*5=5*5-2*5
4*5=5*6-2*5
7*5=9*5=2*5
8*5=10*5-2*5
2*5=5*4-2*5
6*5=10*5-4*5
1*5=2*5-5*1

10*1=10*2-10*1
10*2=10*3-10*1
10*3=10*10-10*7
10*4=10*8-10*4
10*7=10*9-10*2
10*8=10*10-10*2
10*5=10*8-10*3
10*9=10*10-10*1

2*1=2*3-2*2
2*3=2*7-2*2*3
2*4=2*9-2*5
2*5=2*10-2*10
2*6=2*10-2*3
2*7=2*10-2*3
2*8=2*10-2*1