GB-11-05-001 · Using a related calculation

You are given that 664 × 62 = 41168.

(a) Write down $66.4\times0.62$ .

(b) Write down $41168\div6.64$ .

Part (a) Using a Given Calculation (Place Value Scaling) Supplementary GCSE method — not covered in this booklet

Method

1) Track how each factor has been divided/multiplied by powers of 10

2) Apply the net power-of-10 adjustment to the given product

Worked Example (GB-11-05-001 · Part (a))

Write down

66.4\times0.62

41.168

Ans = 41.168

Part (b) Using a Given Calculation (Place Value Scaling) Supplementary GCSE method — not covered in this booklet

Method

1) Track how each factor has been divided/multiplied by powers of 10

2) Apply the net power-of-10 adjustment to the given product

Worked Example (GB-11-05-001 · Part (b))

Write down

41168\div6.64

6200

Ans = 6200