Learning Objective
To understand
multiplication as
repeated addition
and as an array
Multiplication
times
groups
of
lots of
sets of
Here are 6 counters
How many rows are there?
How many columns are there?
3
2
3 rows and 2 columns.
3 x 2 = 6
Could we write a multiplication
sentence?
Could we write an addition sentence? 2 + 2 + 2 =
6
Here are 6 counters
How many rows are there?
How many columns are there?
2
3
2 rows and 3 columns.
2 x 3 = 6
Could we write a multiplication
sentence?
Could we write an addition sentence? 3 + 3 = 6
What do you notice?
2 x 3 = 6
2 + 2 + 2 = 6
3 x 2 = 6
3 + 3 = 6
Here are 10 counters
How many rows are there?
How many columns are there?
5
2
5 rows and 2 columns
Could we write a multiplication
sentence?
Could we write an addition sentence?
5 x 2 = 10
2 + 2 + 2 + 2 + 2 =
10
Here are 10 counters
How many rows are there?
How many columns are there?
2
5
2 rows and 5 columns.
2 x 5 =
10
Could we write a multiplication
sentence?
Could we write an addition sentence? 5 + 5 =
10
What do you notice?
2 x 5 = 10
2 + 2 + 2 + 2 + 2 =
10
5 x 2 = 10
5 + 5 = 10
Here are 12 counters
How many rows are there?
How many columns are there?
6
2
6 rows and 2 columns
Could we write a multiplication
sentence?
Could we write an addition sentence?
6 x 2 = 12
2 + 2 + 2 + 2 + 2 + 2 = 12
Here are 12 counters
How many rows are there?
How many columns are there?
2
6
2 rows and 6 columns.
2 x 6 =
12
Could we write a multiplication
sentence?
Could we write an addition sentence? 6 + 6 =
12
What do you notice?
2 x 6 = 12
2 + 2 + 2 + 2 + 2 + 2 = 12
6 x 2 = 12
6 + 6 = 12
Mrs Masterson bakes cakes.
She bakes her four children two
cakes each.
How many cakes does she bake?
4 x 2 = 8
2 + 2 + 2 + 2 = 8
2 x 4 = 8
4 + 4 = 8
Mrs Patel buys some sweets.
She buys her five friends two
sweets each.
How many sweets does she
buy?
5 x 2 = 10
2 x 5 = 10
2 + 2 + 2 + 2 + 2 =
10
5 + 5 = 10
Miss Smets buys some pencils.
She buys her seven friends two
pencils each.
How many pencils does she
buy?
7 x 2 = 14
2 x 7 = 14
2 + 2 + 2 + 2 + 2 + 2 + 2 = 14
7 + 7 = 14
Learning Objective
To understand
multiplication as
repeated addition
and as an array

multiplication_repeated arrays for highschool .ppt

  • 1.
    Learning Objective To understand multiplicationas repeated addition and as an array
  • 2.
  • 3.
    Here are 6counters How many rows are there? How many columns are there? 3 2
  • 4.
    3 rows and2 columns. 3 x 2 = 6 Could we write a multiplication sentence? Could we write an addition sentence? 2 + 2 + 2 = 6
  • 5.
    Here are 6counters How many rows are there? How many columns are there? 2 3
  • 6.
    2 rows and3 columns. 2 x 3 = 6 Could we write a multiplication sentence? Could we write an addition sentence? 3 + 3 = 6
  • 7.
    What do younotice? 2 x 3 = 6 2 + 2 + 2 = 6 3 x 2 = 6 3 + 3 = 6
  • 8.
    Here are 10counters How many rows are there? How many columns are there? 5 2
  • 9.
    5 rows and2 columns Could we write a multiplication sentence? Could we write an addition sentence? 5 x 2 = 10 2 + 2 + 2 + 2 + 2 = 10
  • 10.
    Here are 10counters How many rows are there? How many columns are there? 2 5
  • 11.
    2 rows and5 columns. 2 x 5 = 10 Could we write a multiplication sentence? Could we write an addition sentence? 5 + 5 = 10
  • 12.
    What do younotice? 2 x 5 = 10 2 + 2 + 2 + 2 + 2 = 10 5 x 2 = 10 5 + 5 = 10
  • 13.
    Here are 12counters How many rows are there? How many columns are there? 6 2
  • 14.
    6 rows and2 columns Could we write a multiplication sentence? Could we write an addition sentence? 6 x 2 = 12 2 + 2 + 2 + 2 + 2 + 2 = 12
  • 15.
    Here are 12counters How many rows are there? How many columns are there? 2 6
  • 16.
    2 rows and6 columns. 2 x 6 = 12 Could we write a multiplication sentence? Could we write an addition sentence? 6 + 6 = 12
  • 17.
    What do younotice? 2 x 6 = 12 2 + 2 + 2 + 2 + 2 + 2 = 12 6 x 2 = 12 6 + 6 = 12
  • 18.
    Mrs Masterson bakescakes. She bakes her four children two cakes each. How many cakes does she bake?
  • 19.
    4 x 2= 8 2 + 2 + 2 + 2 = 8 2 x 4 = 8 4 + 4 = 8
  • 20.
    Mrs Patel buyssome sweets. She buys her five friends two sweets each. How many sweets does she buy?
  • 21.
    5 x 2= 10 2 x 5 = 10 2 + 2 + 2 + 2 + 2 = 10 5 + 5 = 10
  • 22.
    Miss Smets buyssome pencils. She buys her seven friends two pencils each. How many pencils does she buy?
  • 23.
    7 x 2= 14 2 x 7 = 14 2 + 2 + 2 + 2 + 2 + 2 + 2 = 14 7 + 7 = 14
  • 24.
    Learning Objective To understand multiplicationas repeated addition and as an array