Weight Measurement
Class:- Basic 6
Subject: Mathematics
Week:- 8
Term : Second Term
Topic: Weight
Behavioral objective:-
At the end of the lesson the pupils should be able to:-
1. do conversion involving unit of weight
2. do basic operations on weight
3. solve word problems involving weight.
Instructional material/Reference material:-Online Materials , Textbooks , Workbooks , Lagos state scheme of work, Mathematics book 6
Building Background /connection to prior knowledge :
Students are familiar with various ways of measuring weight
Content
Weight is used to measure how heavy an object is . the heaviness of objects refers to the weight of that object. Various types of objects like scale , measuring weight and bathroom scale are used to measure weight of animals, peoples or objects
Conversion involving unit of weight
1000 grams (g) = 1 kilogram (kg)
1000 kilograms = 1 tonne (t)
1 tonne = 1000 × 1000 grams = 1000 000 g
Basic operation on Weight
Evaluation:-
Change these to grams.
1. 23 kg
2. 105 kg
3. 29.2 kg
4. 17.06 kg
5. 12 kg
6. 14 kg
7. 18 kg
8. 1100 kg
Change these to tonnes.
9. 7000 kg
10. 19046 kg
11. 312345 kg
12. 896 kg
13. 500 kg
14. 250 kg
15. 125 kg
16. 10 kg
Change these to kilograms.
17. 11000 g
18. 27726 g
19. 400 g
20. 250 g
21. 16 tonnes
22. 73 tonnes
23. 8.9 tonnes
24. 0.67 tonnes
How many quarter-kilogram packets of sugar can be packed from each of the amounts of sugar listed below?
25. 50 kg
26. 32 kg
27. 20250 kg
28. 110 kg
29. 18 tonne
30. 0.4 tonne
31.12 tonne
32. 1 tonne
Word problems on weight
Exercise
1. A shopkeeper sold 478 kg 400 g of rice in January and 762 kg 710 g of rice in February. How much rice did he sell in January and February?
2. Adisa is 5.5 kg heavier than Chukwu, who weighs 26.4 kg. What is Adisa’s weight?
3. Give your answer to 4 in grams and kilograms.
4. A sack of groundnuts weighs 22 kg 200 g. The sack alone weighs 6 kg 450 g. What is the weight of the groundnuts?
5. The heaviest boy in Seyi’s class weighs 39.6 kg. The lightest boy weighs 27.9 kg. What is the difference between the weights of the heaviest boy and the lightest boy in Seyi’s class?
6. From a five hundred kilogram of butter, a trader sells ten lots of twenty kilograms and six lots of two kilograms five hundred grams. How much butter is left?
7. A lorry carried seven baskets of kolanuts. Two of the baskets weighed 21 kilograms 90 grams and 26 kilograms 400 grams. Each of the other five baskets weighed 20 kilograms 350 grams. Find the total weight of all the baskets of kolanuts.
8. An empty box weighing 0.75 kilogram is filled with twenty-four packets of rice, each weighing 0.56 kilogram. What is the total weight of the box?
9. A piece of brick weighs 2.25 kilograms. What is the weight of twelve pieces of such bricks?
10. Eight tins of milk weigh 17.6 kilograms. What is the weight of ten tins of milk?