Written Calculations: Multiplication

Multiplication Vocabulary

It is important that children develop mental recall of multiplication tables and associated division facts. By Year 2 they should know by heart facts for the 2 and 10 multiplication tables. By Year 3 they should know by heart facts for the 2,5 and 10 multiplication tables. By Year 4 they should know by heart facts for the 2, 3, 4, 5 and 10 multiplication tables.

 

Progress to 2 digit numbers x by a single digit number through partitioning:
                23 x 6 = (20 x 6) + (3 x 6)
                = 120 + 18
                = 138
 
Leading to the grid method of recording:
  23 x 6
 
X
 
20
 
3
 
6
 
120
 
8
     
            120 + 18 = 138
 
And larger numbers:
    23 x 36
 
X
 
20
 
3
 
30
 
600
 
90
 
6
 
120
 
8
        600 + 120 = 720
        90 + 18 = 108
        720 + 108 = 828
 
    142 x 25
 
 
X
 
100
 
40
 
2
 
20
 
2000
 
800
 
40
 
5
 
500
 
200
 
10
            = 2000 + 1500 + 50
            = 3550 
Leading to compact reading: