Search Results For “adding and subtracting”

Using only the multiplication or division calculator keys change one decimal fraction to another.

Rounding decimals to the nearest whole one, including rounding to kilograms and kilometres.

Rounding decimals to the nearest tenth, including rounding metres and kilometres.

More on converting fractions and mixed numbers to decimals.

Interpreting pie charts.

Finding percentages of numbers and money. Word problems using percentages.

These are about as hard as you will get for mental arithmetic. Many children (and adults) will find them very tricky!

Further practice with mental addition using a variety of strategies to answer them quickly and correctly.

Subtraction crossing any of the tens, hundreds and thousands boundaries. Set them all out in the standard way.

Use knowledge of factors to help with multiplying and dividing larger numbers: quite difficult concepts.

Multiplying whole numbers and tenths by a single digit. When multiplying numbers like these it is a good idea to start with the whole number or units.

Multiply a decimal fraction by 10 or 100: remember to move the digits one place to the left or two places to the left.