Multiplication and division where only one value is negative | Maths

Starter quiz

Work out $40\times600$
- 240
- 2400
- 24 000 ✓
- 240 000
Use an area model to work out: $26\times17=$ ______
- '442' ✓
Work out: $321\times12=$ ______
- '3852' ✓
In the calculation $16\div2$ the __________ is 16.
- addend
- dividend ✓
- divisor
- minuend
- subtrahend
Match each division to the correct partition.
- $108\div4$
  
  ⇔
  
  $100\div4 + 8\div4$ ✓
- $90\div4$
  
  ⇔
  
  $80\div4+8\div4+2\div4$ ✓
- $68\div4$
  
  ⇔
  
  $40\div4+20\div4+8\div4$ ✓
- $72\div4$
  
  ⇔
  
  $60\div4+12\div4$ ✓
Work out: $342\div9=$ ______
- '38' ✓

Work out $3\times (-2)$
- (-6) ✓
- (-5)
- 5
- 6
Match each calculation to its correct answer.
- $4\times (-2)$
  
  ⇔
  
  $(-8)$ ✓
- $(-3)\times 3$
  
  ⇔
  
  $(-9)$ ✓
- $5\times (-2)$
  
  ⇔
  
  $(-10)$ ✓
- $(-3)\times 4$
  
  ⇔
  
  $(-12)$ ✓
- $11\times (-1)$
  
  ⇔
  
  $(-11)$ ✓
Select all the calculations that have a product of $-60$
- $(-40)+(-20)$
- $(-30)\times2$ ✓
- $(-100)+40$
- $(-4)\times15$ ✓
- $(-12)\times6$
Work out: $(-36)\div9=$ ______
- '(-4)' ✓
Select all the calculations that have an answer of $-6$
- $(-18)\div3=$ ✓
- $(-12)\div2=$ ✓
- $(-30)\div6=$
- $(-54)\div8=$
- $(-72)\div12=$ ✓
Match each multiplication calculation to a division calculation with the same answer.
- $(-3)\times6$
  
  ⇔
  
  $(-36)\div2$ ✓
- $(-4)\times5$
  
  ⇔
  
  $(-80)\div4$ ✓
- $2\times(-6)$
  
  ⇔
  
  $(-48)\div4$ ✓
- $5\times(-3)$
  
  ⇔
  
  $(-45)\div3$ ✓

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Multiplication can be represented by an array.
Multiplication can be easier by considering factors.
Division can be seen as dividing into groups and then counting the number in each group.
Division can be seen as knowing the size of a group and calculating the number of groups.

When working with counters students may count them and not appreciate they represent negatives.

Stress the importance of 2 different coloured counters as there is a need to represent positive and negative integers differently.