Starter quiz
- Write in the missing number: 30 + ______ = 180
- '150' ✓
- Tick the possible solutions for ___ + ___ = 180
- 35 and 155
- 40 and 140 ✓
- 25 and 160
- 20 and 160 ✓
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What is the missing angle? ______°- '30' ✓
- Without applying commutativity, how many possible solutions are there if each of the missing values are integers? ___ + ___ = 10
- 5 ✓
- 6
- 8
- 9
- 10
-
- Which pair of numbers that sum to 10 have a difference of 4? ___ + ___ = 10
- 5 and 5
- 6 and 4
- 7 and 3 ✓
- 8 and 2
- 9 and 1
-
- Write the number that is two-thirds the size of 15
- '10' ✓
Exit quiz
Two rods are equivalent to the dark green rod. One of them is red. What is the missing rod?- Red rod (A)
- Light green rod (B)
- Pink rod (C) ✓
- Yellow rod (D)
-
- Two rods are equivalent to the dark green rod. One of them is light green. What is the missing rod?
- Red (A)
- Light Green (B) ✓
- Pink (C)
- Yellow (D)
-
Two rods are equivalent to the yellow rod. What could be the missing rods be?- A: Red and light green ✓
- B: Pink and red
- C: White and pink ✓
- D: White and light green
-
Two rods are equivalent to the pink rod. What could be the missing rods be?- A: Red and light green
- B: White and red
- C: White and light green ✓
- D: Red and red ✓
-
Two rods are equivalent to the blue rod. There is a difference of red between the rods. What rods could they be?- Light green and red
- Yellow and light green ✓
- Light green and white
- Yellow and pink
-
Two rods are equivalent to the dark green. One rod is twice the size of the other rod. What rods could they be?- Red and yellow
- Red and light green
- Light green and white
- Pink and red ✓
-
Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- Unknowns can be connected additively.
- Unknowns can be connected multiplicatively.
- Representations can show if unknowns are related additively or multiplicatively.
Common misconception
Pupils struggle to understand how to represent the number rods to show the difference when trying to find the missing rod.
Ensure pupils spend time representing each question with an equation then match this with the number rods. This may help them to visualise the missing part as well.
Keywords
Difference - The difference is the result of subtracting one number from another. How much one number differs from another.
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