(560÷2)÷(40÷2)=

It can be changed to 560/2/40*2.

Then divide by 2 and multiply by 2 to cancel,

So it is equal to 560/40= 14.

(400÷5)÷(50÷5)=

This problem is the same as the last one, and it becomes 400/5/50*5=

Then divide by 5 and multiply by 5 to cancel,

Become 400/50=8

(560÷ 10)÷(40÷ 10)=

This question is the same as the last one, so I won't go into details.

2

1089/ 1 1=99 1 10889/ 1 1 1=99 1 1 108889/ 1 1 1 1=999

So 20041{1.10 2004 8 {888.89 ÷ 20051{1kloc-0/668.

three

450÷90, if the dividend is expanded to 10 times, the quotient (also expanded to 10 times);

If the divisor is reduced to one tenth of the original 10, the quotient will be expanded to 10 times.

If the dividend and divisor are reduced to one tenth of the original 10, then the quotient (unchanged).

Is there anything you can't ask me?

I hope it helps you!

I wish you progress in your study.