Question

10 adunari repetate prin termeni egali ex:9+9+9+9+9+9=54..........18+18+18.......30+18(clasa2)​

Answer 1

Răspuns:

7+7+7+7+7+7 = 42 ( -> 7×6 )

20+20+20+20+20 = 100 ( -> 20×5 )

15+15+15+15+15 = 75 ( -> 15×5 )

2+2+2+2+2+2+2+2 = 16 ( -> 2×8 ).

Answer 2

6+6+6+6+6+6=36

7+7+7+7=28

9+9+9+9+9+9+9+9=72

6+6+6=18

8+8+8+8+8+8+8+8=64

10+10+10+10+10+10+10+10+10+10=100

5+5+5+5+5+5=30

3+3+3+3+3+3+3=21

8+8+8+8+8=40

7+7+7+7+7=35