# Maths Year 6 – 1b Number & Value – Negative Numbers

## Problem Solving

Often we have to solve problems which will involve positive and negative numbers. When this is required we need to remember a few key facts about these numbers:

• Negative numbers extend the numberline to below zero
• When we increase from a negative number we move up the numberline
• When we decrease from a negative number we move down the numberline

Can you think of some real life situations which use negative numbers?

• Temperature
• Depths below sea level
• Bank accounts

What can we do now?

Now that you can solve problems involving negative numbers you can answer these questions:

1)  In the morning of December 3rd the temperature in Birmingham was -3ºc. In the afternoon it was 5ºc. What was the difference in temperatures?

2) Bobby’s bank balance showed as -£34 when he checked it. He deposits £50 into his account. What will his balance be now?

3)  A waterproof watch says it can do to depths of -3 metres. If Eric is diving at -10 metres, how far below the recommended level for the watch is he?

National Curriculum

Pupils should learn to:-

• count in multiples of 6, 7, 9, 25 and 1000
• find 1000 more or less than a given number
• count backwards through zero to include negative numbers
• recognise the place value of each digit in a four-digit number (thousands, hundreds, tens, and ones)
• order and compare numbers beyond 1000
•  identify, represent and estimate numbers using different representations
• round any number to the nearest 10, 100 or 1000
• solve number and practical problems that involve all of the above and with increasingly large positive numbers
• read Roman numerals to 100 (I to C) and know that over time, the numeral system changed to include the concept of zero and place value.