Question

помогите пожалуйста​

Answer 1

$4\cdot28\cdot25=(4\cdot25)\cdot28=100\cdot28=2800\\\\25\cdot29\cdot4\cdot3=(25\cdot4)\cdot(29\cdot3)=100\cdot(29\cdot3)=100\cdot87=8700\\\\15\cdot(2\cdot3)=(15\cdot2)\cdot3=30\cdot3=90\\\\36\cdot(25\cdot4)=36\cdot100=3600\\\\25\cdot(8\cdot4)=(25\cdot4)\cdot8=100\cdot8=800\\\\15\cdot(9\cdot4)=(15\cdot4)\cdot9=60\cdot9=540\\\\59\cdot(2\cdot5)=59\cdot10=590\\\\54\cdot(5\cdot2)=54\cdot10=540$

Answer 2

4*28*25=100*28=2800

25*29*4*3=100*29*3=2900*3=8700

15*(2*3)=90*3=270

36*(25*4)=36*100=3600

25*(8*4)=100*8=800

15*(9*4)=60*9=540

59*(2*3)=59*6=590

54*(5*2)=54*10=540