About Number Compare
Compare numbers represented as numerals, objects, groups, and ten frames. Use a sentence, number line, or stacked units to determine the larger group. Hear the comparison spoken aloud in two different languages.
How to play Number Compare
Everything is hands-on: drag, click and experiment — the simulation reacts instantly. Compare numbers represented as numerals, objects, groups, and ten frames.
Questions & answers
- What is Number Compare?
- Number Compare is a free interactive simulation from PhET Interactive Simulations (University of Colorado Boulder) that you can play right in your browser on crumble.lol — no downloads and no sign-up. Compare numbers represented as numerals, objects, groups, and ten frames. Use a sentence, number line, or stacked units to determine the larger group.
- What can kids learn from Number Compare?
- It helps kids explore: coordinate across multiple representations of a number: written/spoken word, numeral, ten-frame, ones, and objects. identify the number of objects in a group. compare numbers and quantities up to 10, using a strategy such as grouping, subitizing, counting, or a number line. compare quantities in ten frames.
- What age is Number Compare good for?
- It is designed for elementary school (roughly ages 5–10), and curious kids outside that range can absolutely enjoy poking around it too.
- Is Number Compare free to play?
- Yes — Number Compare is completely free on crumble.lol and runs fully in your browser on computers and tablets.