# Multiplication Strategies

AO elaboration and other teaching resources

These exercises and activities are for students to use independently of the teacher to practice number properties.

multiply by one decimal place decimal using compensating

mutliply by one decimal place decimal using place value

Multiplication and division, AP (Stage 8)

### Prior knowledge.

Recall multiplication facts

Use the rounding and compensating strategy when multiplying whole numbers

Use the place value strategy to solve problems involving whole numbers

### Background

in this activity students who can use place value and compensating with whole numbers learn to use these staregies when mutliplying decimals.

### Comments on the Exercises

**Exercise 1
**Asks students to solve a basic fact and then use compensating to solve a multiplication problem involving a one decimal place decimal. For example, 3 x 5 = 15 so 3 x 4.9 = 14.7, 3 x 4.8 = 14.4, 3 x 5.1 = 15.5, 3 x 5.2 = 15.6

**Exercise 2**

Asks students to solve multiplication problems involving decimals by using compensating. For example 3 x 6.8 = (3 x 7 = 21) - (3 x 0.2) = 19.4

**Exercise 3**

Asks students to solve multiplication problems involving decimals by using place value strategies. For example, 2 x 4.2 = 8.4.

**Exercise 4**

Asks students to solve multiplication problems involving decimals by using place value strategies but the problems involve adding the tenths to the whole number. For example, 4 x 3.4 = 12 + 1.6 = 13.6.

**Exercise 5
**Asks students to solve multiplication problems involving decimals by choosing the most appropriate strategy.

Attachment | Size |
---|---|

MultStrategiesTenthsSheet.pdf | 106.23 KB |

MultStrategiesTenthsSheet.doc | 52 KB |