Răspuns :

Lupumiruna29id
Metoda 1:
1) 447*2 = 894
2) 5*123=615
3) 1576*4=6304
4) 7*122=854
5) 52:4=13

Metoda 2:
1) 123*2 +324*2 = 246+648 =894
2) 5*34 + 5*89 = 170+445 = 615
3) 2143*4 - 567*4 = 8572 - 2268 = 6304
4) 48:4 + 40:4 -36:4 = 12+10-9 = 13

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