Use the written method of addition to obtain a decimal number.

$7:9 =$

Calculate the first three digits so that you can later round to two decimal places.

$7:9=0.777\dots$

Now you round the last digit away (up) and you obtain:

$\frac{7}{9}\approx0.78$

Use the written method of addition to obtain a decimal number.

$11 : 125 =$

Calculate the first three digits so that you can later round to two decimal places.

$11:125=0.088$

Now you round the last digit away (up) and you obtain:

$\frac{11}{125}\approx0.09$

Use the written method of addition to obtain a decimal number.

$8 : 23 =$

Calculate the first three digits so that you can later round to two decimal places.

$8:23=0.347\dots$

Now you round the last digit away (up) and you obtain:

$\frac{8}{23}\approx0.35$

Use the written method of addition to obtain a decimal number.

$\frac{9}{100}=$

When you divide a number by 100, you can directly move the decimal point of the number two places (that is, the number of zeros after one) to the left.

$=0.09$

This number does not have to be rounded, since it has already only two decimal places.