Negative Numbers in Context: Below Zero, Below Sea Level

Four degrees below zero, six metres under the sea, two levels below the ground floor: how can each be written with one number? Meet negative numbers and their minus sign, read and place numbers on a number line through zero, upright like a thermometer or across like a ruler, and compare them in context: the lower number is the colder temperature, the deeper point, the lower floor. Then order four divers, find how far a gull is from a diver, and meet opposite numbers. Timestamps (measured on the final): 0:00 — Three positions 0:41 — One minus sign 1:10 — Positive and negative 2:01 — Reading a number line 3:07 — The cliff 3:48 — The quiz 4:26 — Lower is smaller 5:11 — Which place is colder? 5:39 — Four divers 6:23 — How far apart? 7:13 — Integers 7:38 — Opposite numbers 8:15 — Your turn 9:17 — Let's remember 🎓 Free interactive lesson: https://commeunjeu.org/cours/ib-pyp-5... 📱 Android: https://play.google.com/store/apps/de... 📱 iPhone: https://commeunjeu.org/mobile/ 🎵 Music: "Ever Mindful" by Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 4.0 http://creativecommons.org/licenses/b...