Missing Operation
Choose plus, minus, or multiply to make the equation true.
Getting ready…
How to play
Choose plus, minus, or multiply to make the equation true.
About this activity
Missing Operation. Reason about the effect of different operations. Three levels to explore at your own pace.
- What to practice
- Reason about the effect of different operations.
- Controls
- Choose one answer. Use a finger, mouse, or Tab and Enter/Space. A wrong choice lets you try again.
- Choosing a level
- Start with Easy. Medium and Hard extend the activity with more rounds, choices, or a larger challenge. You can change the level or restart at any time.
Big buttons and simple controls on phones, tablets, and computers.