Question

Calculeaza folosind comutativitatea si asociativitatea:25x5x4x2= 4x50x9x20= 5x3x4x100= 9x3x2x300= 124x(8+5)= (27 +6)x38= 52x3+102x3= 150x25x10=

Answer 1

25x5x4x2=(25x4)x(2x5)=100x10=1000
4x50x9x20=(4x9)x(50x20)=36x1000=36000
5x3x4x100=(5x4)x(3x100)= 20x300=6000
9x3x2x300=(3x2)x(9x300)=6x2700=16200
124x(8+5)= 124x8+124x5= 992+620=1612
(27+6)x38=27x38+6x38=1026+228=1254
52x3+102x3=(52+102)x3=154x3=462
150x25x10=(15x25)x 10 x10= 375x100=37500