SUBJECT: MATHEMATICS W.A.L.A: METRIC WEIGHT

Day s

W.A..L.T:

Content

Plenary

Starter

Task

Homework

**Monday**

To measure weight of various objects.

Convert units of weights

Resources

Inside out

Learn

mathematics Book 6, page

42

Weighing balance, scale balance, stones, and bottles.

__INTRODUCTION TO METRIC WEIGHT__The heaviness of an object tells us what weight is. There are various objects for measuring weight such as the scale balance, the weighing and the spring balance. The basic unit of measuring weight is gram (g). The weight of heavy objects like bags of cement are measured in kilograms while light objects like pen, pencil are weighed in grams.

**CONVERSION OF METRIC METRIC WEIGHT**

10 milligrams (mg) = 1 centimeter (cg)

10 centigrams = 1 decigrams (dg)

10dg = 1 gram (g)

100cg = 1g

1000g = 1 kilogram (g)

1000kg = 1 ton (t)

Pupils should be Able to ;

Define weight, find the various units of measuring weight and with the aid of weight instruments like scale balance measure weights of an object.

STARTER

Begin the lesson by showing pupils a scale balance then ask to stand on it and measure their weights.

PLENARY

The pupils are given a Worksheet which contains different objects and they are to tick which one they think should be heavier as a result of size and nature of the object.

EXERCISE

Convert the following weights to gram:

i. 1kg

ii. 5kg

iii. 5mg

iv. 2200cg

Convert the following weights to kg:

i. 2500g

ii. 200g

iii. 1600mg

iv. 200cg

**Tuesday**

Add units of weights

Resources

Inside out

Learn

mathematics Book 6, page

43

Weighing balance, scale balance, stones, bottles.

__ADDITION OF METRIC WEIGHT__Addition of metric weight is similar to basic addition arithmetic. But note:

10mg = 1cg, 100cg = 1g, 1000g = 1kg, 1000kg = 1 t

EXAMPLES

1. Add 24cg 9mg to 33cg 8mg

Solution

PLENARY

Pupils should be able to add various units of weight together.

STARTER

Start the lesson by asking them questions on units of weight and perform basic addition operation.

EXERCISES

Inside out mathematics Book 6, page 43 exercise 6.1 (1 - 5)

Inside out mathematics Book 6, page 43 exercise 6.1 (10 - 16)

**Wednesday**

Subtract metric weight

**Resources**

Inside out

mathematics Book 6, page

43

Weighing balance, scale balance, stones, bottles.

__SUBTRACTION OF METRIC WEIGHT__Subtraction of metric weight is similar to basic subtraction operation. But note:

10mg = 1cg, 100cg = 1g, 1000g = 1kg, 1000kg = 1 t

EXAMPLES

1. Subtract 11cg 7mg from 24cg 6mg

Solution

PLENARY

Pupils should be able to subtract various units of weights.

STARTER

Begin the lesson by asking them solutions on subtraction problems.

EXERCISES

Inside out mathematics Book 6, page 43 exercise 6.2 (1 - 5)

Inside out mathematics Book 6, page 43 exercise 6.2 (6 - 10)

**Thursday**

Multiply units of metric weight

Divide units of metric weight

**Resources**

Inside out

Learn

mathematics Book 6, page

44 - 46

Weighing balance, scale balance, stones, bottles.

__MULTIPLICATION OF METRIC WEIGHT__

EXAMPLE

1. 3g 45cg 4mg x 4

__DIVISION OF METRIC WEIGHT__

__EXAMPLE__2. 9g 84cg 9mg ÷ 7

PLENARY

Pupils should be able to multiply and divide various units of weight.

STARTER

Begin the lesson by doing the first example for them.

EXERCISES

Inside out mathematics Book 6, page 45 exercise 6.3 (1 - 3) and 6.4 (1 – 3)

Inside out mathematics Book 6, page 45 exercise 6.3 (4 - 6) and 6.4 (4 – 7)

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