Mental Math

Write in digits the number three hundred and twenty-three.

What is the sum of seventy-one and eleven?

How many right angles to make a three-quarter turn?

Multiply seven by seven.

How many centimeters are there in one metre?

• 10 cm

• 100 cm

• 1000 cm

• 10 000 cm

What is forty-five more than twenty-five?

Write a number that is one hundred less than three hundred forty-one.

Divide three hundred and twenty by ten.

What is three hundred and twenty-one minus twenty?

Write one-tenth as a decimal number.