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Year 5 · Maths · Place value to 1,000,000 · Lesson 3

Negative numbers and Roman numerals

Negative numbers in context (counting through zero, differences, temperature) and Roman numerals to 1,000 (M, D, C, L, X, V, I).

Whiteboard video lesson: Negative numbers and Roman numerals

18-minute video lesson

Teaching, worked examples and 20 practice questions solved step by step.

Watch free for a month

What your child will learn

  • Count forwards and backwards through zero
  • Find differences across zero
  • Read Roman numerals to 1,000
  • Write numbers in Roman numerals

The method

  1. Number line.
  2. Count to 0, then on.
  3. Split H, T, O.
  4. Smaller first = subtract.

Key words: negative number, number line, zero, Roman numerals, temperature.

Worked examples

The first three practice questions from the lesson, with every step.

Question 1

Start at 2. Count back 5. Where do you land?

  1. Step 1: Use a number line
  2. Step 2: 2 − 5 = −3

Answer: −3

Question 2

Start at −3. Count on 4. Where do you land?

  1. Step 1: Use a number line
  2. Step 2: −3 + 4 = 1

Answer: 1

Question 3

Start at −1. Count on 6. Where do you land?

  1. Step 1: Use a number line
  2. Step 2: −1 + 6 = 5

Answer: 5