See attached math question at the bottom portion. i cannot understand the instruction. reason: write 6 different subtraction sentences that will fit in each of the boxes above based from attachment. use the same beginning number each time.

answer:

its easy

step-by-step explanation:

write a subtraction problem for each of the squares. they all must start with the same number.

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.

1 x=22.52

2: 65/39=604+39x

65x-39x=604

26x=604

x=604/26

×=23.23