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a fost răspuns

calulati ca adunare repetata 7*2/5,6*4/3,3*3/2,20*7/25,1/36*21.​

Răspuns :

Alisia21333

Răspuns:

7×2/5 = 2/5 + 2/5 +2/5 + 2/5 + 2/5 + 2/5 + 2/5 = 14/5

6×4/3 = 4/3 + 4/3 +4/3 +4/3+ 4/3 + 4/3 = 24/3 = 8

3 × 3/2 = 3/2 + 3/2 + 3/2 = 9/2

20 × 7/25 = 7/25 + 7/25 +7/25 +7/25 +7/25 +7/25 +7/25 +7/25 +7/25 +7/25 +7/25 +7/25 +7/25 +7/25 +7/25 +7/25 +7/25 +7/25 +7/25 +7/25 = 140/25

21 × 1/36 = 1/36 +  1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 = 21/36