### METRIC WEIGHT LESSON PLAN AND LESSON NOTE FOR PRIMARY, SECONDARY AND HIGH SCHOOLS

SUBJECT: MATHEMATICS                W.A.L.A:  METRIC WEIGHT
Day s
W.A..L.T:
Content
Plenary
Starter
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

Resources
Inside out
Learn
mathematics Book 6, page
43

Weighing balance, scale balance, stones, bottles.

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)