9 times table pattern spotting

Over the past three Thursdays, year 4 have been pattern spotting with the nine times table (and there are lots of patterns!)

One of our main discoveries was:

  • For numbers up to 100, the digits in the product (answer) always add to make 9 or 18.

We also discovered a pattern that informs us whether the digits will add to make 9 or 18!

A few of us even went on to investigate with the aid of a spreadsheet and establish which numbers have digits that add up to make 27!

“If a number has three digits the same, like 999, 333 or 444, the digits in the product add up to make 27” Isabelle, Y4