Numbers & Arithmetic

Try it Yourself 2 Tracks 8 Concepts 1 hr 30 min of learning

CodePLU Goal

Upgrading Human Mental Models

Learn how to think in Workflows

Numbers Preview

Every number belongs to a family

Sorting a number into the right family is the first real maths skill — and it is much clearer when you can see the families side by side.

Drag nodes and connect the flow to understand the concept
Press enter or space to select a node. You can then use the arrow keys to move the node around. Press delete to remove it and escape to cancel.
Press enter or space to select an edge. You can then press delete to remove it or escape to cancel.

Tracks In This Category

TrackPartsDurationLevel
Making Sense of Numbers

Four ideas that sit underneath every sum you will ever do: which family a number belongs to, why a digit changes value when it moves, which operation happens first, and how numbers divide into and multiply out of each other. Nothing here needs a calculator, and each part assumes the one before it.

442 minBeginner
Three Ways to Write the Same Number

Start with what a fraction actually says, learn why two different-looking fractions can be equal, then move freely between fractions, decimals and percentages. The last part asks the harder question — what a percentage is really measuring — because a percentage on its own tells you less than most people assume.

448 minBeginner