Question

Calculeaza cat mai rapid posibil 25×97×4;87×505×4×3;37+37+37+37;3949×50×2;25×5×4×3

Answer 1

a) 25 x 97 x 4 = 100 x 97 = 9.700

b) 87 x 505 x 4 x 3 = (87 x 3 ) x (505 x 4) = 261 x 2.020 = 527.220

c) 37 + 37 + 37 + 37 = 37 x 4 = 148

d) 3.949 x 50 x 2 = 3949 x 100 = 394.900

e) 25 x 5 x 4 x 3 = 15 x 100 = 1.500