Question

Grupează convenabil produsele pentru a calcula mai rapid. a) 3 x 10 x 10 x 3 x 2
b) 7 x 10 x 5 x 2
c) 10 x 4 x 2 x 5 x 10​

Answer 1

a) 3 x 10 x 10 x 3 x 2=10x 10 x 3 x 3 x 2=100x9x2=100x18=1800

b) 7 x 10 x 5 x 2=70×10=700

c) 10 x 4 x 2 x 5 x 10=10×10×5×2×4=100×10×4=1000×4=4000

SPOR!!!