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Multiplying Consecutive Numbers

In this worksheet, students find two consecutive numbers which multiply to a given number. They round numbers so that they can calculate their answers mentally.

'Multiplying Consecutive Numbers' worksheet

Key stage:  KS 3

Curriculum topic:   Number

Curriculum subtopic:   Use Approximation to Estimate/Calculate Answers

Difficulty level:  

Worksheet Overview

In this activity, we will learn how to find the two consecutive numbers (neighbouring numbers) that multiply together to give a given number.



Find the two consecutive numbers that multiply together to give the following number.


462 = _______ × _______



You need to think of clues.

1.     You should know that 20 x 20 = 400

2.     Look at the last digit, which is 2 here.  Think of consecutive numbers that multiply to give a final digit of 2.  They are 1 and 2 or 3 and 4 or 6 and 7 or 8 and 9.

3.     Now use trial and improvement.


462 =          21           ×          22         

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