Rock wall

Rock wall

Pencil and paperOnline interactive
Overview
Using this Resource
Connecting to the Curriculum
Marking Student Responses
Further Resources
This task is about working out how many rocks are in a wall.
brick-wall.png
This farmer has made a rock wall.

Question 2Change answer

a)  This rock wall is 7 rocks wide and 5 rocks high.
     How many rocks are in the wall?  

Question 2Change answer

b)  The farmer wanted to make the wall higher. He added 3 more rows.
     i)    How many more rocks did he use?  
     ii)   What is the length of the wall now? 
     iii)  What is the height of the wall now? 
     iv)  How many rocks are in the wall now? 
Task administration: 
This task can be completed with pencil and paper or online (with SOME auto marking).
Levels:
2, 3
Curriculum info: 
Maths, Number and Algebra, Number Strategies
Keywords: 
multiplication, arrays
Description of task: 
Students calculate the number of rocks in a wall set up as an array.
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 multiplication problems.
Learning Progression Frameworks
This resource can provide evidence of learning associated with
Multiplicative thinking, sets 3-4
Multiplicative thinking, sets 4-5
within the Mathematics Learning Progressions Frameworks.
Read more about the Learning Progressions Frameworks.
Answers/responses: 
 

Y5 (05/1998)
a)    35 very easy
b) i)
ii)
iii)
iv)		 21
7
8
56 (or answers to a) + b) i) or answer to b) ii) × b) iii)).		 moderate
easy
easy
moderate