Week beginning August27th – Foundation to Year 2
If you put three beads onto a tens/units abacus you could make the numbers 3, 30, 12 or 21.
Explore the numbers you can make using six beads.
I used six lego bricks to pretend they were beads on an abacus. I started with six bricks on one side (the units) to make 6 then swapped it to the tens side to make 60.
I then took one brick and moved it over to the units side to make 51, then swapped them over (making 15).
I moved another from the 5 to the 1.
Then I repeated the process until I got to three on each side.
Answers: 6,60,15,51,42,24 and 33.