Question

efectuează prin adunare repetată de termeni egali 2 x5 3x6 4x7 5x8 7x7 8x9 9x4 10x9 ​

Answer 1

1). 2 + 2 + 2 + 2 + 2 = 10

2) 3 + 3 + 3 + 3 + 3 + 3 = 18

3). 4 + 4 + 4 + 4 + 4 + 4 + 4. = 28

4). 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 = 40

5). 7 + 7 + 7 + 7 + 7 + 7 + 7 = 49

6). 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 = 72

7). 9 + 9 + 9 + 9 = 36

8). 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 = 90

Answer 2

Răspuns:

2×5=5+5=10

3×6=6+6+6=18

4×7=7+7+7+7=28

5×8=5+5+5+5+5+5+5+5=40

7×7=7+7+7+7+7+7+7=49

8×9=9+9+9+9+9+9+9+9=72

9×4=9+9+9+9=36

10×9=10+10+10+10+10+10+10+10+10=90