Multiplying 2-digit numbers

Sums of Anarchy on Instagram: "To multiply numbers ending in zeros, we can use a technique that I like to call the Zeroomerang: zeros go out, multiply what’s left, same numbers of zeros come back: e.g. 30x40 ✨2 zeros go out ✨3x4=12 ✨2 zeros come back: 1200 It works for more trailing zeros too (only zeros at the end of a number): e.g. 500x200 ✨4 zeros go out ✨5x2=10 ✨4 zeros come back: 100,000 We’re just a couple of weeks away from the release of our Mathemagic mental maths course, which will giv