The purpose of this activity is to support students deriving new multiplication facts by subtracting from known multiplication facts that involve multiples of five and ten. For example, subtracting 6 from 6 x 10 = 60 can be used to find 6 x 9 = 54.
Next steps
Use similar examples, deriving from multiples of five.
For example, ask six students to hold up five fingers each.
Change the six sets of five into six sets of four.
How many fingers do we have in total now?
Printed from https://meaningfulmaths.nt.edu.au/mmws/nz/resource/deriving-subtracting-tens-and-fives at 9:01pm on the 26th February 2024