Question

Calculeaza rapid, grupând în mod convenabil factorii:

a) 25×57×4

b) 15×45×6×2

c) 80×25×5×8

d) 150×50×4×6

Answer 1

a) 25×57×4=25×(57×4)=25×228=5700

b) 15×45×6×2=(15×6)×(45×2)=90×90=8100

c) 80×25×5×8=(80×5)×(25×8)=400×200=80000

d) 150×50×4×6=(150×4)×(50×6)=600×300=180000
Succes in continuare si un an nou fericit:)