** Subject**: Mathematics

** Topic**: Multiplication of Decimals by Whole Numbers

** Duration**: 40mins/period

__Reference____ Material__: Macmillan Champion Mathematics, 5

__Previous____ Knowledge:__ Pupils are familiar with multiplication.

__Objective____:__ At the end of the lesson, pupils should:

- Multiply decimals by 10, 100 and 1000
- Solve word problems on multiplication of decimals by whole numbers

__Content____: __

** Example 1:** Multiply 3.8 x 10 =

The decimal points moves one place to the right

** Example 2:** Multiply 2.74 x 100 = 274

When multiplied by 100, the decimal point is moved two places to the right

** Example 3:** 3.8 x 1000 = 3800

When we multiply by 1000, the decimal point is moved three places to the right

** Presentation**:

** Step 1:** Teacher revises the previous lessons with the pupils

** Step 2:** Teacher introduces and solve examples on the new topic

** Step 3:** Pupils are allowed to ask questions

** Step 4:** Teacher writes questions on multiplication of decimals by whole number on the board for pupils to solve.

__ __

** Evaluation**:

(a) 56.9 x 57 (b) 75.9 x 86 (c) 7.324 x 41 (d) 36.8 x 35

(e) The weekly salary of a worker is N850.75. Find his monthly salary.

(f) If 1 packet of biscuits cost N685.50. Find the costs of 80 similar packets.

** Conclusion**: Teacher moves round for inspection, marking and correction of notes where necessary

** Assignment**: Page 86, Ex 2, 1 – 5.

Page 88, 1 – 5.