Idea 21of 24Builds onDivide in friendly chunks
What is left over
What happens when the chunks do not use up every bit?
Today you'll discover
- what a remainder is
- why it is less than the divisor
- how to write it with R
Think first250 ÷ 12: twenty 12s make 240
250 ÷ 12: twenty 12s make 240. What is the answer?
Decide first, then press Next. Check the leftover is less than the divisor.
The rectangle for 250 ÷ 12 with two parts of 10 × 12 = 120 and the column 250, 130, 10. Then a small dashed piece at the end marked 10 left, and the column ends 20 R10. The last step shows 500 ÷ 24.
See the whole ideathe big idea and the key word, in one place
The big idea
The remainder is what is left over, and it is always less than the divisor.
Easy to get wrongR10 is not .10: 20 R10 means 10 whole things left over, not one tenth.
For example250 pencils in boxes of 12: 20 full boxes, and 10 pencils left over.
Key word
- remainder
- what is left over when a number cannot be divided equally, written with R: 20 R10
Ready to use it?
- Divide and write the remainder with R.
- Check that a remainder is less than the divisor.