Divide the sum of and by their differences.

is equal to

is equal to

On dividing 7 bythe result is

equal to:

is equal to:

Fill in the blanks to make the statements true.

While dividing a fraction by another fraction, we _________ the first fraction by the _______ of the other fraction.

What number divided by 520 gives the same quotient as 85 divided by 0.625?

In her science class, Jyoti learned that the atomic weight of Helium is 4.0030; of Hydrogen is 1.0080; and of Oxygen is 16.0000. Find the difference between the atomic weights of:

a) Oxygen and Hydrogen

b) Oxygen and Helium

c) Helium and Hydrogen

When 0.02964 is divided by 0.004, what will be the quotient?

Measurement made in science lab must be as accurate as possible. Ravi measured the length of an iron rod and said it was 19.34 cm long; Kamal said 19.25 cm; and Tabish said 19.27 cm. The correct length was 19.33 cm. How much of error was made by each of the boys?