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calculeaza: j÷6×9÷7×7

Răspuns :

9j : 6 :7×7
63 j :6:7
63
__  j:7
6

21
--- j:7
2

3
-- j
2
---
1

= 3 supra 2 j

j÷ 54÷7*7= j÷54........