# Decimals. Addition & Subtraction Example Find: 15.12 + 3.2 - 12.04 Solution: 15.12 + 3.2 = 15.12 + 3.20 = 18.32 15.12 + 3.2 - 12.04 =18.32 – 12.04 =

## Presentation on theme: "Decimals. Addition & Subtraction Example Find: 15.12 + 3.2 - 12.04 Solution: 15.12 + 3.2 = 15.12 + 3.20 = 18.32 15.12 + 3.2 - 12.04 =18.32 – 12.04 ="— Presentation transcript:

Decimals

Example Find: 15.12 + 3.2 - 12.04 Solution: 15.12 + 3.2 = 15.12 + 3.20 = 18.32 15.12 + 3.2 - 12.04 =18.32 – 12.04 = 6.28

Multiplication

Example Find: 12.5 x 35.02

Solution (1) First multiply: 125 x 3502 125 x 3502 = 437750 (2) Second find he sum of he decimal places (to the right) of the wo numbers 12.5 and 35.02, which is here one plus two; that is three. (3) Now write the result of step (1), count three decimal places from the left and place the decimal point at the start of the third figure, like that: 437. 750

Justification Another way to present the solution

Division

Examples

Example (1)

Example (2)

Example (3)

Example (4)

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