New
New
Year 1

Find the missing part in an equation

I can find the missing part in an equation.

New
New
Year 1

Find the missing part in an equation

I can find the missing part in an equation.

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Lesson details

Key learning points

  1. Number sense and subitising skills can be used to help find missing parts.
  2. Patterns in the number system can be used to help find missing parts.
  3. Working systematically can help to spot number patterns.

Common misconception

Children may think the missing number in an equation always has to be the whole.

Encourage children to record their thinking, bringing attention to the missing part by underlining it.

Keywords

  • Equation - Shows that one number or expression is equal to another.

  • Part - Any numbers that can be added together to form a whole.

  • Whole - The result of adding two or more parts.

Encourage children to work systematically and build number sense by predicting the next missing part. Encourage checking to see if they are right. Continue using the bar model during Learning Cycle 2 to highlight the change in the parts.
Teacher tip

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).

Video

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6 Questions

Q1.
Without counting, tell me how many balls are in the picture?
An image in a quiz
Correct Answer: 5, five
Q2.
Which of these numbers is a part in this equation? 4 + 2 = 6
6
Correct answer: 2
Correct answer: 4
Q3.
Match the amounts that are equal.
Correct Answer:6,2 + 4

2 + 4

Correct Answer:8,5 + 3

5 + 3

Correct Answer:10,9 + 1

9 + 1

Q4.
Which equation can represent this picture?
An image in a quiz
8 = 5 = 3
3 + 5 + 8
5 = 3 + 8
Correct answer: 5 + 3 = 8
Q5.
There are 3 frogs in the pond and 6 frogs on a log. Which equation would I write to find out how many frogs there are altogether?
Correct answer: 3 + 6 = _
6 - 3 = _
9 + 3 = _
Correct answer: 6 + 3 = _
Q6.
= 4 + 5
Correct Answer: 9, nine

6 Questions

Q1.
There are 6 pebbles altogether. Fill in the missing part.
An image in a quiz
Correct Answer: 2, two
Q2.
What does the 4 represent in this equation? 6 + 4 = 10
An image in a quiz
Correct answer: The hidden counters
The whole group
The counters we can see
Q3.
Izzy has this bead string made up of 10 beads. She hides some beads. Which bar model represents this?
An image in a quiz
An image in a quiz
An image in a quiz
Correct Answer: An image in a quiz
An image in a quiz
Q4.
Jun rolls two dice. He writes this equation to show the number he rolled and the total altogether. 5 + _ = 8 Which of these dice represents the missing part in the equation?
An image in a quiz
An image in a quiz
Correct Answer: An image in a quiz
An image in a quiz
Q5.
Izzy has 6 counters. She hides 2. Fill in the missing part to show how many she can still see.
6
Correct answer: 4
2
Q6.
Use the number patterns in the equations to find the missing part in this equation?
An image in a quiz
Correct answer: 4
8
3