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Reception Maths · ReceptionChapter 3 · Comparing quantities
Reception Maths · Comparing quantities · Lesson 3.2

Reception Maths: The same as: equal groups

Part of the Reception Maths comparing quantities chapter. Chapter overview · whole chapter on one page

3.2

The same as: equal groups

Reception
Know when two groups are the same, Equal to

Ravi has five cubes. Sam has five cubes too. They have the same number.

When two groups have the same number of things, we say they are the same, or equal. When you match one to one, nothing is left over.

ab
Two rows of cubes. Are they the same?

Key ideas

  • The same means equal: the same number of things.
  • Match one to one: no thing is left over.
  • Groups can look different and still be the same.
Worked example 3.2.1
Do both rows have the same number? Yes or no?
ab

Method. Count each row. Then see if the numbers are the same.

  1. Count row a. Touch each one once.
    5
  2. Count row b. Touch each one once.
    5
  3. Compare the two numbers. The same number means the same amount.
    5 and 5
  4. Write the answer.
    Yes

Check. Match one to one. Every thing has a partner. ✓

Watch out. Two rows can look different and still have the same number.

Worked example 3.2.2
Do both rows have the same number? Yes or no?
ab

Method. Count each row. Then see if the numbers are the same.

  1. Count row a. Touch each one once.
    4
  2. Count row b. Touch each one once.
    6
  3. Compare the two numbers. The same number means the same amount.
    4 and 6
  4. Write the answer.
    No

Check. Match one to one. One row has things left over. ✓

Watch out. Two rows can look different and still have the same number.

Worked example 3.2.3
Do both rows have the same number? Yes or no?
ab

Method. Count each row. Then see if the numbers are the same.

  1. Count row a. Touch each one once.
    3
  2. Count row b. Touch each one once.
    3
  3. Compare the two numbers. The same number means the same amount.
    3 and 3
  4. Write the answer.
    Yes

Check. Match one to one. Every thing has a partner. ✓

Watch out. Two rows can look different and still have the same number.

Watch out

Watch out: a longer row is not always the bigger number. The things may be closer together. Count or match them.

Exam tip

Grown-up tip. Put two groups of buttons on a table, one spread out and one close together. Ask: “Do they have the same number?” Then count both groups together.

Exercise 3B  The same

Non-calculator
1
FDo both rows have the same number? Yes or no?
ab
2
FDo both rows have the same number? Yes or no?
ab
3
FDo both rows have the same number? Yes or no?
ab
4
FDo both rows have the same number? Yes or no?
ab
5
FRavi has 5 cubes. Sam has 5 cubes. Do they have the same number? Explain.
6
FWhich number is the same as 7? Choose 6, 7 or 8.
7
FWhich number is the same as 4? Choose 3, 4 or 5.
8
FTwo rows have the same number of things. Row a has 8 balls. How many does row b have?
9
RBen says two rows are the same because they both look long. Is he right? Explain.
10
PSSam has 6 counters. Ali has 6 counters but they are spread out. Are they the same? Explain.
11
PSRuby says row a and row b are the same, because both rows have 4 things. Row a has 4 apples and row b has 5 stars. Is she right?
12
RTwo rows have the same number. Row a has 3 stars, and row b has 3 cubes but they are in a different pattern. Explain how you know they are equal.

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