Question

Efectuează:
10 X 7 + 7 X 1 = ..................................................;

10 X 7 - 5 X 7 = ..................................................;

7 X 7 - 6 X 6 - 3 X 3 = ..................................................;

1 X 2 X 3 + 4 X 5 + 6 X 7 = ..................................................;​

Answer 1

Explicație pas cu pas:

10 X 7 + 7 X 1 = 70+7=77

10 X 7 - 5 X 7 = 70-35=35

7 X 7 - 6 X 6 - 3 X 3 = 49-36-9=4

1 X 2 X 3 + 4 X 5 + 6 X 7 = 6+20+42=68

Answer 2

Răspuns:

1)10x7+7x1=70+7=77

2)10x7-5x7=70-35=35

3)7x7-6x6-3x3=49-36-9=10-9=1

4)1x2x3+4x5+6x7=9+20+42=29+42=71