Multiplying Two Decimals — What 0.4 × 0.3 Really Means

Tom's mosaic tile is 0.4 dm by 0.3 dm, and he writes 1.2 dm² — a tile bigger than a whole square decimetre?! Count the little squares: 4 × 3 = 12 hundredths, so 0.4 × 0.3 = 0.12. Learn to multiply two decimals by decomposing (whole numbers first, then the 0.1's), why a tenth of a tenth is a hundredth, and the bigger-or-smaller check to make on every product. 🎓 Free interactive lesson: https://commeunjeu.org/cours/ib-myp-2... 📱 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...