Wednesday 3rd February

LF: To use partitioning for multiplication

Today, you will use the method of partitioning to multiply 2-digit numbers.  Partitioning is a way of working out maths problems that involve large numbers by splitting them into smaller units so they're easier to work with.  I have shown you some examples below.

Partitioning

15 x 5 = 75

10 x 5 = 50

 5 x 5 = 25

27 x 3 = 81

20 x 3 = 60

  7 x 3 = 21

“20 multiplied by 3 equals 60 and 7 multiplied by 3 equals 21. 60 add 21 equals 81.”

Star challenge

Try this …

Hassan is calculating 32 x 5.  He writes his answer 15010.  Can you work out Hassan’s mistake and write an explanation of how he could do it correctly?