Description of task:
Students identify the missing part of equations shown as number machines.
Curriculum Links:
Links to National Standards (Patterns and relationships Level 3)
This resource can provide one source of evidence of students' ability to continue number patterns based on multiplication and addition.
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.
Diagnostic and formative information:

Common errors

Likely calculation

Likely misconception

a)
b)
c)
d)

÷ 2
× 4
+ 12
× 8 
4 ÷ 2 = 2
5 × 4 = 20
2 + 12 = 14
2 × 8 = 16 
Gives the rule for the righthand numbers to turn into the lefthand numbers (rather than vice versa).

a)
b)
c)
d)

+ 2
– 15
÷ 7
– 14 
2 + 2 = 4
20 – 15 = 5
14 ÷ 7 = 2
16 – 14 = 2 
Gives a rule than only works for the first pair of numbers.
