Question

9 Efectuati:
a 5 (5+5. (5' - 59: 5')] +3.5;
han 210 : 29):105-9. 10.

Answer 1

Răspuns:

5[5+5(5³-5²)]-3×25=

5[5+5×5²(5-1)-75=          AICI DAM FACTOR COMUN PE 5²

5(5+5×25×4)-75=

5(5+500)-75=

5×505-75=2450

PTR AL DOILEA

(6+2²)^7:10^5-90=

(6+4)^7:10^5-90

10^7:10^5-90

10^2-90=100-90=10

^ACEST SEMN REPREZ PUTEREA