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Multiplication to 12 x 12 |
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CONTENTS |
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| Multiplication to 12 x 12 |
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Workout |
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46 slides |
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| Multiplication to 12 x 12 |
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Library |
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12 questions |
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Once you have registered, you can work through the slides one by one.
The workout comprises a series of sides that guide you systematically through the topic concept by concept, skill by skill. The slides may be used with or without the support of a tutor. The methodology is based on problem-solving that advances in logical succession by concept and difficulty. The student is presented with a problem or series of questions, and the next slide presents the fully-worked solution. To use the material you must sign-in or create an account.
blacksacademy.net comprises a complete course in mathematics with resources that are comprehensive.
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SAMPLE FROM THE WORKOUT |
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SLIDE 1 - TASK 1 |
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SLIDE 2 - SOLUTION |
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SAMPLE FROM THE LIBRARY |
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QUESTION [difficulty 0.2] |
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SOLUTION |
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DEPENDENCIES |
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CONCEPTS |
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LEV. |
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9 times table
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328.1 |
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Multiplication by 10 by adding a zero
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328.9 |
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Multiplicaton by 100 by adding 2 zeros
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329.1 |
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Iteration of multiplication by 2
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329.3 |
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Exponent (implicit concept of exponent of power 2)
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329.3 |
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Power of 3
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329.5 |
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Power of 5
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329.5 |
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Power of 10
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329.7 |
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Division by 10
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329.9 |
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Division by 100
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329.9 |
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Method of cancelling zeros
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330.1 |
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Method in general
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330.2 |
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Number puzzle - finding missing zeros
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330.5 |
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11 and 12 times table
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330.7 |
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Number puzzle - finding missing 1s and other digits
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330.9 |
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Business calculations
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331.7 |
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Practical caculations involving space
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331.9 |
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Game calculations
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331.9 |
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Method: multiplying by 10 adds 1 zero
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332.1 |
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Method: multiplying by 100 adds 2 zeros
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332.1 |
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One dozen = 12
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332.3 |
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Practical calcuations in recipes
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332.3 |
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Discount
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332.5 |
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RAW CONTENT OF THE WORKOUT |
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| To make use of this chapter, please first register. Then you can work through the slides one by one. |
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| What is provided here is the raw text of the workout. Most of the information is contained in the image files, which are not included with this text. The text may appear deceptively short. (The content overall of blacksacademy.net is vast.) Any in-line questions appear as a question mark [?]. This text is provided only as an indication of the overall quantity of material contained in the chapter. To use the material you must sign-in or create an account. |
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SLIDE1
Fill in the missing numbers
1 2 3 4 5 6 7 8 9 10 11 12
1 1 2 3
2 4 6
3
4 4 24
5 5
6 6
7 70
8
9
10
11
12
SLIDE 2
1 2 3 4 5 6 7 8 9 10 11 12
1 1 2 3 4 5 6 7 8 9 10 11 12
2 2 4 6 8 10 12 14 16 18 20 22 24
3 3 6 9 12 15 18 21 24 27 30 33 36
4 4 8 12 16 20 24 28 32 36 40 44 48
5 5 10 15 20 25 30 35 40 45 50 55 60
6 6 12 18 24 30 36 42 48 54 60 66 72
7 7 14 21 28 35 42 49 56 63 70 77 84
8 8 16 24 32 40 48 56 64 72 80 88 96
9 9 18 27 36 45 54 63 72 81 90 99 108
10 10 20 30 40 50 60 70 80 90 100 110 120
11 11 22 33 44 55 66 77 88 99 110 121 132
12 12 24 36 48 60 72 84 96 108 120 132 144
SLIDE 3
Complete the wheel
SLIDE 4
SLIDE 5
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SLIDE 7
Fill in the boxes
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SLIDE 10
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SLIDE 19
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SLIDE 20
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SLIDE 21
Method
Cancelling out zeros
Questions
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SLIDE 22
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SLIDE 24
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SLIDE 25
Fill in the missing numbers
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SLIDE 26
Fill in the missing numbers
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SLIDE 27
Complete the wheel
SLIDE 28
SLIDE 29
Fill in the missing numbers.
In each question all the boxes are filled by the same number.
Example:
Clue: they have all to do with the eleven times table.
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SLIDE 30
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SLIDE 31
Complete the wheel
SLIDE 32
SLIDE 33
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SLIDE 34
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SLIDE 35
Work out the following
(a) (b)
(c) (d)
(e)
(f)
SLIDE 36
(a)
(b)
(c)
(d)
(e)
(f)
SLIDE 37
? A restaurant owner bought six tablecloths for £12 each and eight dinner plates for £8 each. How much did he spend?
? A business account has £1000. The following payments are made for casual labour.
10 hours at £11
9 hours at £12
After these payments are made, how much is left in the account?
SLIDE 38
? A restaurant bought six tablecloths for £12 each and eight dinner plates for £8 each. How much did the restaurant spend?
The restaurant spent £136.
? A business account has £1000. The following payments are made for casual labour: 10 hours at £11, 9 hours at £12. After these payments are made, how much is left in the account?
£782 left
SLIDE 39
? I needed to tile my bathroom. I bought five boxes of 12 tiles and seven boxes of 8 tiles. I needed 110 tiles. How many tiles did I have left over?
? You get points for capturing pieces in a game. Each piece has a value.
Blue 8 points Red 9 points Green 12 points
In one game, I captured six blue pieces, eight red pieces and four green pieces. I needed 150 points to win. Did I win?
SLIDE 40
? I needed to tile my bathroom. I bought five boxes of 12 tiles and seven boxes of 8 tiles. I need 110 tiles. How many tiles did I have left over?
6 tiles remaining
? You get points for capturing pieces in a game. Each piece has a value.
Blue 8 points Red 9 points Green 12 points
In one game, I captured six blue pieces, eight red pieces and four green pieces. I needed 150 points to win. Did I win?
168 points. Yes, I won!
SLIDE 41
Example
Find
Method
Answer 60
Exercise
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SLIDE 42
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SLIDE 43
A dozen is twelve.
Example. I bought six boxes of a dozen eggs. How many eggs did I buy?
Answer:
? A baker bought four boxes of a dozen eggs. 2 were broken. He used 30 eggs making a wedding cake. How many good eggs were left?
? A old recipe went as follows. Take two dozen eggs. Separate the whites from the yolks. Beat the whites. …
A food processing company wishes to repeat this process 1000 times.
How many eggs does the company need?
SLIDE 44
? A baker bought four boxes of a dozen eggs. 2 were broken. He used 30 eggs making a wedding cake. How many good eggs were left?
16 good eggs left
? This is from an old recipe. Take two dozen eggs. Separate the whites from the yolks. Beat the whites. …
A food processing company wishes to repeat this process 1000 times.
How many eggs does the company need?
24,000 eggs needed
SLIDE 45
“Buy by the dozen and we will give you £2 for every 100 you buy.”
You by 50 boxes of a dozen at £6 per box. How much do you pay?
SLIDE 46
“Buy by the dozen and we will give you £2 for every 100 you buy.”
You by 50 boxes of a dozen at £6 per box. How much do you pay?
Answer £288.
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