Search Results For “revise 2, 5 and 10”

Mini investigations involving amounts of time, large numbers and, not forgetting, blades of grass!

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.

Adding two 3-digit numbers mentally. Often it is best to start with the hundreds, then the tens and finally the units; this is the opposite order than when using written methods.

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.

Tricky sums, these. Think about the digits in the tenths and hundredths columns when working out these addition of decimals questions.

When adding using decimals it is very important that the decimal points should line up under each other. If the sum also involves whole numbers it is a good idea to put a decimal point after the whole number followed by a zero.