Question

Exercitii : 10 11 si 20
Dau coroana!!!! Primul coroana

Answer 1

Răspuns:

10.a)

$724 \times 999 = 724 \times (1000 - 1) = 724 \times 1000 - 724 \times 1 = 724000 - 724 = 723.276$

$380 \times 999 = 380 \times (1000 - 1) = 380 \times 1000 - 380 \times 1 = 380000 - 380 = 379.620$

$405 \times 999 = 405 \times (1000 - 1) = 405 \times 1000 - 405 \times 1 = 405000 - 405 = 404.595$

b)

$657 \times 999 = 657 \times (1000 - 1) = 657 \times 1000 - 657 = 657000 - 657 = 656.343$

$380 \times 999 = 380 \times (1000 - 1) = 380 \times 1000 - 380 = 380000 - 380 = 379.620$

$678 \times 999 = 678 \times (1000 - 1) = 678 \times 1000 - 678 = 678000 - 678 = 677.322$

11.

$827 \times 469 = 387.863$

............ Le mai combini si tu......

20. O sa dau direct raspunsul

a. 89×2×144

b.2×80×94

c.2×113×82