Balance Scales
The heavier side goes down. Level means equal.
Grade
Every level, up to two-step equations like 2n + 3 = 11.
Question1/ 8Right0
Your stars
- Heavier or lighter Grade 1—
- Make it balance Grade 2—
- Missing number Grade 2—
- Both sides equal Grade 4—
- Letters for numbers Grade 5—
- Two-step equations Grade 6—
Seven of eight earns the star. Stars are saved on this device, and to your account when you are signed in.
Remember
- The heavier side goes down and the lighter side goes up.
- When the scale is level, both sides weigh the same: that is what = means.
- For 7 + ? = 12, count on from 7 to 12, or take away: 12 − 7 = 5.
- A letter stands for a number we do not know yet. 3n means 3 × n.
- Whatever you do to one side, do to the other, and the scale stays level.