Lemons, library and sports

Lemons, library and sports

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 numbers.
Read each problem and work out the answer.

Question 1Change answer

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a)  Mrs Brown has 33 lemons and Mrs Smith has 29 lemons.
     How many lemons are there altogether?

 

Question 1Change answer

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b)  Kevin was asked to wait 35 minutes at the library. 
     After 19 minutes had gone, how many minutes did he still have to wait?

 

Question 1Change answer

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c)  At a sports day there were 38 children from one school, 47 from a second school and 56 from a third school. 
     How many children were there altogether?
Task administration: 
This task can be completed with pencil and paper or online (with auto marking displayed to students).
Level:
2
Curriculum info: 
Maths, Number and Algebra, Number Strategies
Keywords: 
addition, subtraction
Description of task: 
Students use addition and subtraction to solve story problems.
Curriculum Links: 
This resource can help to identify students' ability to use basic facts and knowledge of place value and partitioning whole numbers to solve addition and subtraction problems.
Learning Progression Frameworks
This resource can provide evidence of learning associated with
Additive thinking, set 5
within the Mathematics Learning Progressions Frameworks.
Read more about the Learning Progressions Frameworks.
Answers/responses: 
  Y4 (06/1999)
a) 62 easy
b) 16 difficult
c) 141 difficult
Diagnostic and formative information: 
  Student response Likely calculation Likely reason
a)
 
c)		 512
 
1221		 9 + 3 = 12
3 + 2 = 5
8 + 7 + 6 = 21
3 + 4 + 5 = 12		 Calculates ones and tens separately and combines the results in one number.
a) 52   Forgets to carry the ten from 9 + 3 = 12
b) 24 9 - 5 = 4
30 - 10 = 20		 "Won't go" subtraction error (does 9 - 5 instead of 15 - 9).
b) 54 35 + 19 Adding instead of subtracting.
c) 132    138
    47
    56   132		 Error equivalent to transposing ones and tens in the vertical algorithm, i.e., 8 + 7 + 6 = 21