Starter Activity

1
LO To understand different methods for multiplication. 9-Nov-14
Starter Activity You have been given two
calculations. Can you spot the mistakes and
correct them?
2
3 Students each buy 2 apples on the 5 days they go to school in a week. How many apples do they buy? 3 x 2 6 x 5 30 5 students buy 8 apples each. The cost of an apple is 49p. How much did they spend? 5 x 8 40 x 50 2000 40 x 1 40 2000 - 40 1960
Correction Correction
3
Think / Pair / Share
I want to know what 7 x 8 is but I dont know
either my 7 x table or my 8 times table. What
can I do?
4
Class suggestions .. 7 x 8
5
Think / Pair / ShareNow I know that 7 x 8
56What else do I know?For example, do I also
know 7 x 80?
6
Class suggestions 7 x 8 56 so.
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The Box Method
54.2 x 32.3
x 50 4 0.2
30
2
0.3
Draw this grid on your mini whiteboards. Fill in
any boxes that you can. Dont worry if you cant
do all of them.
8
Using a multiplication square to multiply6 x 8
48
Go down the column until you reach 8 sixes
Find the 6 x table
x 1 2 3 4 5 6 7 8 9 10
1 1 2 3 4 5 6 7 8 9 10
2 2 4 6 8 10 12 14 16 18 20
3 3 6 9 12 15 18 21 24 27 30
4 4 8 12 16 20 24 28 32 36 40
5 5 10 15 20 25 30 35 40 45 50
6 6 12 18 24 30 36 42 48 54 60
7 7 14 21 28 35 42 49 56 63 70
8 8 16 24 32 40 48 56 64 72 80
9 9 18 27 36 45 54 63 72 81 90
10 10 20 30 40 50 60 70 80 90 100
9
What level can I work at?
Level 2 I can work out multiplication sums up to
10 x 10. Level 3 I can multiply two
digit numbers by 2, 3, 4, 5 or 10. Level 4 I
can multiply two digit whole numbers by a single
digit whole digit number. Level 5 I can
multiply two digit numbers by three digit
numbers. Level 6 I can multiply decimal
numbers.
10
Choose an appropriate level of challenge to start
on. You do not have to complete all of the
questions for each level before moving on.
Answer all the questions in your book. Show all
your working out.
Level 2 Level 3 Level 4 Level 5 Level 6
3 x 4 8 x 2 7 x 5 6 x 9 3 x 8 7 x 7 10 x 3 9 x 8 4 x 5 13 x 3 28 x 2 37 x 4 26 x 5 73 x 10 57 x 2 17 x 3 49 x 4 34 x 5 23 x 9 48 x 7 57 x 8 76 x 6 83 x 8 97 x 7 37 x 6 49 x 8 54 x 9 33 x 92 58 x 47 27 x 38 86 x 62 84 x 28 95 x 71 47 x 62 59 x 83 74 x 29 3.4 x 9.2 58. 3 x 4.7 27. 1 x 13.8 8.64 x 6.23 84.6 x 28.7 95.4 x 71.2 4.77 x 6.2 0.59 x 8.3 0.74 x 0.29
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Plenary
What is wrong with this statement? 42 x 34 40
x 30 1200 2 x 4 8 42 x 34 1208