Starter quiz
- Use the correct inequality symbol to make this correct: 16.75 ______ 19.05
- '<' ✓
- Which of the following expressions has the same difference as 10 − 5.5? Can you reason without calculating?
- 11 − 5
- 11 − 6.5 ✓
- 9 − 4.5 ✓
- 10 − 5
-
- What is 5.35 when rounded to the nearest whole number?
- '5' ✓
- Use an efficient strategy to calculate 45.85 + 29.96 = ______
- '75.81' ✓
- Use an efficient strategy to calculate 67,895 − 65,460 = ______
- '2,435 ' ✓
- Izzy begins with 800 g of plasticine and removes 75 g. Jun begins with 980 g of plasticine and removes an unknown amount. Now they have the same mass of plasticine. How much did Jun remove? ______ g
- '255' ✓
Exit quiz
Which symbol needs to go between this pair of expressions?- >
- = ✓
- <
-
Which symbol needs to go between this pair of expressions?- <
- > ✓
- =
-
What is the smallest possible value for the missing number in this equation?- '59.24' ✓
What is the difference in rainfall between June and July in Sydney? Give your answer using the correct unit of measure.- '55 mm' ✓
- Which of these statements represents comparing the wettest and driest months in Sydney and Manchester?
- 95 − 125 > 95 − 70
- 125 − 55 > 95 − 55 ✓
- 125 − 95 > 60 − 55
- 125 + 60 > 95 + 55
-
- Match the compared expressions.
- 95 − 55 >⇔90 − 55 ✓
- 75 − 65 =⇔70 − 60 ✓
- 55 + 55 <⇔55 + 60 ✓
Worksheet
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Presentation
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Lesson Details
Key learning points
- Knowledge of addition and subtraction can be used to solve problems involving comparing balancing expressions.
- Expressions can be formed from data in tables and graphs, and used to make comparisons.
- Expressions can be formed from data presented in tables and graphs and can be used to make comparisons.
Common misconception
Difference can represent a rise or fall in values so the calculation can have a positive or negative answer. Difference as change is always expressed as a positive value.
Focus on finding equivalent changes in the data presented and ensure that pupils see that the change is a positive value that can be qualified with describing it as a rise or a fall, depending on the situation.
Keywords
Expression - An expression contains one or more terms or numbers, where each term or number is separated by an operator but an expression does not have an equals sign.
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