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a fost răspuns

Calculati cat mai usor posibil grupând in mod convenabil factorii
A) 25x20x8x5=
B) 125x12x4x5=
C) 40x15x5x10=
D) 15x45x6x2=
E) 150x50x4x6=

Răspuns :

A)25×20×8×5=(25×8)(20×5)=200×100=20000
B)125×14×4×5=(125×4)(14×5)=300×70=21000
C)40×15×5×10=(40×5)(15×10)=200×150=30000
D)150×50×4×6=(150×4)(50×6)=600×300=180000
a)20000
b)30000
c)30000
d)2700
e)180000

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