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  1. Maths
  2. Year 2
  3. Addition
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Know Your Numbers: Tens and Ones (20-39)

In this worksheet, students use tens and ones to solve money problems.

'Know Your Numbers: Tens and Ones (20-39)' worksheet

Key stage:  KS 1

Curriculum topic:   Number: Number and Place Value

Curriculum subtopic:   Recognise Tens and Ones

Difficulty level:  

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Worksheet Overview

QUESTION 1 of 10

Look at the coins, there are 10p's and 1p's. Can you add the coins together to work out the total amount? Then try to work out which number is missing from the calculation.

 

Example:

21 = 20 + 1

Can you add the coins together to work out the missing number in the calculation below? Write the number in the box below.


33 = 30 + ?

Can you add the coins together to work out the missing number in the calculation below? Write the number in the box below.



37 = 30 +  ?

Can you add the coins together to work out the missing number in the calculation below? Write the number in the box below.



27 = 20 + ?

Can you add the coins together to work out the missing number in the calculation below? Write the number in the box below.



28 = 20 + ?

Can you add the coins together to work out the missing number in the calculation below? Write the number in the box below.



22 = 20 +  ?

Can you add the coins together to work out the missing number in the calculation below? Write the number in the box below.


29 = 20 + ?

Can you add the coins together to work out the missing number in the calculation below? Write the number in the box below.


36 = 30 + ?

Can you add the coins together to work out the missing number in the calculation below? Write the number in the box below.


21 = 20 +  ?

Can you add the coins together to work out the missing number in the calculation below? Write the number in the box below.


39 = 30 + ? 

Can you add the coins together to work out the missing number in the calculation below? Write the number in the box below.


25 = 20 + ? 
  • ANSWERS
  • Question 1

Can you add the coins together to work out the missing number in the calculation below? Write the number in the box below.


33 = 30 + ?
CORRECT ANSWER
3
EDDIE SAYS
30p (10p + 10p + 10p) + 3p (+1p +1p +1p) = 33p
  • ANSWERS
  • Question 2

Can you add the coins together to work out the missing number in the calculation below? Write the number in the box below.



37 = 30 +  ?
CORRECT ANSWER
7
EDDIE SAYS
30p (10p + 10p + 10p) + 7p (+1p +1p +1p +1p +1p +1p +1p) = 37p
  • ANSWERS
  • Question 3

Can you add the coins together to work out the missing number in the calculation below? Write the number in the box below.



27 = 20 + ?
CORRECT ANSWER
7
EDDIE SAYS
20p (10p + 10p) + 7p (+1p +1p +1p +1p +1p +1p +1p) = 27p
  • ANSWERS
  • Question 4

Can you add the coins together to work out the missing number in the calculation below? Write the number in the box below.



28 = 20 + ?
CORRECT ANSWER
8
EDDIE SAYS
20p (10p + 10p) + 8p (+1p +1p +1p +1p +1p +1p +1p +1p) = 28p
  • ANSWERS
  • Question 5

Can you add the coins together to work out the missing number in the calculation below? Write the number in the box below.



22 = 20 +  ?
CORRECT ANSWER
2
EDDIE SAYS
20p (10p + 10p) + 2p (+1p +1p) = 22p
  • ANSWERS
  • Question 6

Can you add the coins together to work out the missing number in the calculation below? Write the number in the box below.


29 = 20 + ?
CORRECT ANSWER
9
EDDIE SAYS
20p (10p + 10p) + 9p (+1p +1p +1p +1p +1p +1p +1p +1p +1p) = 29p
  • ANSWERS
  • Question 7

Can you add the coins together to work out the missing number in the calculation below? Write the number in the box below.


36 = 30 + ?
CORRECT ANSWER
6
EDDIE SAYS
30p (10p + 10p + 10p) + 6p (+1p +1p +1p +1p +1p +1p) = 36p
  • ANSWERS
  • Question 8

Can you add the coins together to work out the missing number in the calculation below? Write the number in the box below.


21 = 20 +  ?
CORRECT ANSWER
1
EDDIE SAYS
20p (10p + 10p) + 1p = 21p
  • ANSWERS
  • Question 9

Can you add the coins together to work out the missing number in the calculation below? Write the number in the box below.


39 = 30 + ? 
CORRECT ANSWER
9
EDDIE SAYS
30p (10p + 10p + 10p) + 9p (+1p +1p +1p +1p +1p +1p +1p +1p +1p) = 39p
  • ANSWERS
  • Question 10

Can you add the coins together to work out the missing number in the calculation below? Write the number in the box below.


25 = 20 + ? 
CORRECT ANSWER
5
EDDIE SAYS
20p (10p + 10p) + 5p (+1p +1p +1p +1p +1p) = 25p
---- OR ----

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