Adding and subtracting decimals

Adding and subtracting decimals

Auto-markingPencil and paperOnline interactive
Overview
Using this Resource
Connecting to the Curriculum
Marking Student Responses
Working with Students
Further Resources
This task is about adding and subtracting decimal numbers.

Question 1Change answer

Solve the following equations.

a)  0.75 + 5 =   

b)  0.8 + 9 =   

c)  5 + 0.3 + 11 + 2.4 + 0.28 =   

d)  0.8 - 0.3 =   

e)  6 - 0.4 =   

f)  64.3 - 9.62 =   

Task administration: 

Students should not use calculators.

This task can be completed using pencil and paper or online with auto-marking.

Level:
4
Description of task: 
For this NEMP task students perform a range of addition and subtraction calculations using whole numbers and decimals.
Learning Progression Frameworks
This resource can provide evidence of learning associated with within the Mathematics Learning Progressions Frameworks.
Read more about the Learning Progressions Frameworks.
Answers/responses: 
   

Y8 (09/1997)

a)

5.75

49%

b)

9.8

49%

c)

18.98

30%

d)

0.5

66%

e)

5.6

41%

f)

54.68

21%

Diagnostic and formative information: 
Commentary
Only 13 percent of the year 8 students correctly answered at least 80% items. A high proportion of the students could not calculate accurately using decimals.