Negative Numbers
Negative numbers with Millie and her kitten Biscuit: what “below zero” means on a winter thermometer; the number line with zero in the middle; which number is bigger, 2 or −2; getting colder and warmer past 0°C; floors below the ground; taking a bigger number away from a smaller one, like 3 − 5 and 2,345 − 3,000; and how a negative number is different from a fraction.
Every card is a little story: “It is 2°C at the skating pond, and then it gets 4 degrees colder. What is the temperature now?” Each topic has its own world and a big seek-and-find picture to explore.
8 topics
Your path through this unit
Step 1 of 2
Initial review
Take a first look at each topic and tick Got it once you have the general idea.