Question

7. Calculaţi prin adunare, folosind modul care vă convine: a) 20 x 2; b) 12 x 4; c) 31 x 3; 3 x 25; 5 x 11; 2 x 41.​

Answer 1

a) 20 x 2 = 20 + 20 = 40

b) 12 x 4 = 12 + 12 + 12 + 12 = 48

c) 31 x 3 = 31 + 31 + 31 = 93

3 x 25 = 25 x 3 = 25 + 25 + 25 = 75

5 x 11 = 11 x 5 = 11 + 11 + 11 + 11 + 11 = 55

2 x 41 = 41 x 2 = 41 + 41 = 82

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Answer 2

Răspuns:

20+ 20 = 40

12+ 12+ 12+ 12 = 48

31+ 31+ 31= 93

25+25+25= 75

11+11+11+11+11= 55

41+41= 82