Question

4. Calculați, folosind factorul comun:
a) 2².47+22.3; b) 3³.27-3³-7;
d) 52.18-25-7-25; e) 26.49-18.72 +2.49.
2.49.C)
c) 10¹-53-10-14+10¹;

Answer 1

Răspuns:

2²(47+3)=4·50=200

3³(27-7)=9·20=180

10⁴(53-14+1)=10000·40=400000

5²(18-7-1)=25·10=250

5²=25

49(26-18+2)=49·10=490

7²=49