Language, notation and formulas

# 2.6.2 Try some yourself

## Activity 6

Read the following expression out aloud or write it out in full in words:

- (a) 3 × 4 + 3 × 5 = 3 (4 + 5).

## Answer

- (a) Three times four, plus three times five equals three times the sum of four and five.

## Activity 7

Which mathematical operations are implied by these words when used in a mathematical sense?

- (a) Sum

- (b) Difference

- (c) Product

- (d) Quotient

State the operations in both words and symbols.

## Answer

- (a) Sum implies addition or +.

- (b) Difference implies subtraction or −.

- (c) Product implies multiplication or ×.

- (d) Quotient implies division or ÷.

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