What multiplication equation does this array represent?
4 × 2 = 16
4 × 4 = 16 ✓
16 × 4 = 16
What is the missing factor in this image?
'10' ✓
Which of these are correct arrays for 12?
Which of these make a rectangle with an area of 32 cm ?
30 cm + 2 cm =
4 cm × 8 cm = ✓
1 cm × 32 cm = ✓
5 cm × 6 cm =
3 cm × 2 cm =
Complete the missing factor: 12 × ______ = 60
'5' ✓
Complete: 72 ÷ ______ = 9
'8' ✓
Exit quiz
Look at the rectangle on the grid. What is being represented?
28 × 7 = 4
7 × 4 = 28 ✓
4 × 7 = 28 ✓
4 × 28 = 7
Look at the rectangle on the grid. What other factor pairs would make a rectangle covering the same area?
20 and 8
1 and 28 ✓
10 and 18
8 and 3
2 and 14 ✓
Which of these are factors of 48?
1 ✓
12 ✓
40
48 ✓
96
Which factor is missing from the factor bug?
'10' ✓
What number is represented by the factor bug?
'30' ✓
What number is represented by the incomplete factor bug?
'32' ✓
Worksheet
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Presentation
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Video
Lesson Details
Key learning points
All numbers have themselves and 1 as factors.
Listing factors in order helps identify all the factors for a given number.
Common misconception
Pupils do not know when to stop looking for more factors.
Build up finding factors of numbers systematically by arranging into rows and columns, starting with 1 row. Encourage pupils to generalise that when the number of rows becomes larger than the number of columns, you can stop looking for factors.
Keywords
Factor - Factors are whole numbers which exactly divide another whole number.
Systematic - Being systematic, means working in a set way, often according to a fixed plan.
What multiplication equation does this array represent?
What is the missing factor in this image?
