New
New
Year 6
Compare the structure of problems with one or two unknowns
I can compare the structure of problems with one or two unknowns.
New
New
Year 6
Compare the structure of problems with one or two unknowns
I can compare the structure of problems with one or two unknowns.
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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.
Keywords
Difference - The difference is the result of subtracting one number from another. How much one number differs from another.
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.
If the pupils have not spent much time yet with number rods, ensure they are allowed time to explore these for themselves.
Teacher tip
Equipment
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
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Starter quiz
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6 Questions
Q1.
Write in the missing number: 30 + = 180
Q2.
Tick the possible solutions for ___ + ___ = 180
35 and 155
25 and 160
Q3.
What is the missing angle? °
Q4.
Without applying commutativity, how many possible solutions are there if each of the missing values are integers? ___ + ___ = 10
6
8
9
10
Q5.
Which pair of numbers that sum to 10 have a difference of 4? ___ + ___ = 10
5 and 5
6 and 4
8 and 2
9 and 1
Q6.
Write the number that is two-thirds the size of 15
Exit quiz
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6 Questions
Q1.
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)
Yellow rod (D)
Q2.
Two rods are equivalent to the dark green rod. One of them is light green. What is the missing rod?
Red (A)
Pink (C)
Yellow (D)
Q3.
Two rods are equivalent to the yellow rod. What could be the missing rods be?
B: Pink and red
D: White and light green
Q4.
Two rods are equivalent to the pink rod. What could be the missing rods be?
A: Red and light green
B: White and red
Q5.
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
Light green and white
Yellow and pink
Q6.
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