Mental addition of large numbers

Adding multiples of ten thousand by counting on.

Adding multiples of one thousand by counting on.

Adding multiples of 100 mentally.

Adding thousands and hundreds mentally.

Work out the addition questions in your head and just write down the answers.

Adding multiples of one hundred by counting on

Use knowledge of known facts to add multiples of 1000 quickly and efficiently.

Quick practice adding multiples of 10,000 to 6-digit numbers.