Place value in two-digit numbers When you are solving an addition calculation with a two-digit number, you need to think about tens and ones.

Use understanding of place value to round multi-digit whole numbers to any place. Remainders Multiply a number of up to four digits by any one-digit number and multiply two two-digit numbers.

Addition involves finding the total of two or more numbers or amounts. There are different things you can use to help you add. You can use number lines, place value charts and place value counters ...