28 times 560 plus 44 times 12.8 and 2.5 times 3.2 times 12.5 are calculated by simple method

28 times 560 plus 44 times 12.8 and 2.5 times 3.2 times 12.5 are calculated by simple method

1.28*560+44*12.8
From the figure, we can see that 12.8 is ten times of 1.28
So conversion:
=12.8*56+44*12.8
=(56+44)*12.8
=128
Second question
2.5*3.2*1.25
=2.5*4*(0.8*1.25)
=10