2.6 Mass  (Page 3/3)

2. Sift the flour and the salt together.

3. Add the flour and the rest of the water little by little to the egg mixture and whisk it thoroughly.

4. Lastly, add the baking powder.

5. Heat a lightly oiled pan. Pour a small quantity of the batter into the pan. Turn it over to brown the pancake on both sides.

6. Turn it out onto a plate, sprinkle with cinnamon sugar, and roll it. This recipe makes 60 pancakes.

How many pancakes are there for each learner if there are 30 learners in the class? There are ___________________________________________________________

Calculate the ingredients you will need if you want to double the recipe:

_______________ cake flour

_______________ eggs

_______________ water

_______________ oil

_______________ baking powder

_______________ salt

Estimate which 5 learners in your class have the smallest mass , write their names in the table and ask your educator to weigh them.

• Who of the 5 learners have the greatest mass ?_________________________
• Who of the 5 learners have the smallest mass ?_________________________
• What is the difference between the two masses?________________________
• What is the total mass of the 5 learners?______________________________

• Find the mass of the following objects, but first estimate whether it is more or less than 1 kg:

• Calculate the total mass of each of the following. Mother buys:

3 x 2 kg rice _________________________________________

5 x 10 kg potatoes____________________________________

6 x 100 g jelly________________________________________

4 x 150 g sweets_______________________________________

2 x 500 g margarine____________________________________

1. Think!

2 x 7 = _____ 9 x 2 = _____ 16 ÷ 2 = _____

5 x 5 = _____ 10 x 3 = _____ 9 ÷ 3 = _____

3 x 9 = _____ 8 x 4 = _____ 20 ÷ 5 = _____

10 x 7 = _____ 6 x 10 = _____ 12 ÷ 4 = _____

4 x 6 = _____ 5 x 2 = _____ 24 ÷ 3 = _____

2 x 8 = _____ 7 x 4 = _____ 10 ÷ 2 = _____

5 x 6 = _____ 6 x 2 = _____ 40 ÷ 10 = _____

10 x 8 = _____ 9 x 4 = _____ 5 ÷ 5 = _____

3 x 0 = _____ 4 x 5 = _____ 16 ÷ 4 = _____

4 x 7 = _____ 6 x 3 = _____ 21 ÷ 3 = _____

2 x 9 = _____ 7 x 5 = _____ 14 ÷ 2 = _____

10 x 10 = _____ 4 x 4 = _____ 36 ÷ 4 = _____

5 x 3 = _____ 5 x 10 = _____ 27 ÷ 3 = _____

3 x 8 = _____ 6 x 5 = _____ 4 ÷ 2 = _____

4 x 9 = _____ 3 x 2 = _____ 45 ÷ 5 = _____

10 x 1 = _____ 8 x 5 = _____ 90 ÷ 10 = _____

2 x 5 = _____ 3 x 3 = _____ 30 ÷ 5 = _____

2. Look at the pattern that Bonny and Tommy have discovered. Complete it:

1 x 2 = 2 10 x 2 = 20 100 x 2 = 200

1 x 3 = _____ 10 x 3 = _____ 100 x 3 = _____

1 x 4 = _____ 10 x 4 = _____ 100 x 4 = _____

1 x 5 = _____ 10 x 5 = _____ 100 x 5 = _____

1 x 6 = _____ 10 x 6 = _____ 100 x 6 = _____

2 x 1 = _____ 20 x 1 = _____ 200 x 1 = _____

2 x 2 = _____ 20 x 2 = _____ 200 x 2 = _____

2 x 3 = _____ 20 x 3 = _____ 200 x 3 = _____

2 x 4 = _____ 20 x 4 = _____ 200 x 4 = _____

2 x 5 = _____ 20 x 5 = _____ 200 x 5 = _____

3 x 1 = _____ 30 x 1 = _____ 300 x 1 = _____

3 x 2 = _____ 30 x 2 = _____ 300 x 2 = _____

3 x 3 = _____ 30 x 3 = _____ 300 x 3 = _____

4 x 1 = _____ 40 x 1 = _____ 400 x 1 = _____

4 x 2 = _____ 40 x 2 = _____ 400 x 2 = _____

5 x 1 = _____ 50 x 1 = _____ 500 x 1 = _____

5 x 2 = _____ 50 x 2 = _____ 500 x 2 = _____

• Let us see how Bonny and Tommy have solved this problem.

Granny baked some cookies and packed them into 3 tins. There are 23 cookies in each tin. How many cookies did she bake altogether?

• Try to solve this problem in the same way.

Grandpa planted 4 rows of trees. There are 12 trees in each row. How many trees did he plant altogether?

• Do the calculations and use the method you like best:44 x 2 =

32 x 3 =

2 1 x 4 =

1 1 x 5 =

• Use your own method to solve the problems. Show how you do it:

The past 4 days Granny collected 22 eggs from the nests every day. How many eggs did she collect altogether?

• She collected ___________________________________________________

On Monday Granny and Bonny baked 120 cookies. On Tuesday they baked 48 and on Wednesday another 100. How many cookies did they bake altogether?

• They baked _____________________________________________________

Assessment

Learning Outcome 1: The learner will be able to recognise, describe and represent numbers and their relationships, and to count, estimate, calculate and check with competence and confidence in solving problems.

Assessment Standard 1.8: We know this when the learner can perform calculations, using appropriate symbols, to solve problems;

Assessment Standard 1.9: We know this when the learner performs mental calculations;

Learning Outcome 2: The learner will be able to recognise, describe and represent patterns and relationships, as well as to solve problems using algebraic language and skills.

Assessment Standard 2.2: We know this when the learner copies and extends simple number sequences to at least 1 000;

Learning Outcome 4: The learner will be able to use appropriate measuring units, instruments and formulae in a variety of contexts.

Assesseringstandaard 4.5: We know this when the learner estimates, measures, compares and orders three-dimensional objects using non-standard and standard measures.