# Term 3 - September 9th (3-6)

##### Year 3 to Year 6: Amy’s Dominoes

Amy has a box containing ordinary domino pieces but she does not think it is a complete set.

She has 24 dominoes in her box and there are 125 spots on them altogether.

Which of her domino pieces are missing?

#### Solution

I wrote down all different dominoes in order (0:0, 0:1, 0:2…6:6), I counted them all and there were 28.

It told me that Amy had four dominoes missing.

I then added all the spots on the dominoes together and made a total of 168.

It told me that Amy was missing 43 spots.

I was looking for four dominoes that totalled 43 spots.

I began with the highest domino (6:6) because we had to get a high number (43) with a low number of dominoes.

I worked out that the missing were 6:6, 5:6, 5:5 and 4:6. These four dominoes totalled the missing amount of 43 spots!

Amy needs to look after her dominoes by putting them in a safer place!

Prev Next

We respectfully acknowledge the traditional owners of the land on which Edithvale Primary School is located and pay respects to their Elders past and present and emerging.