It feels like a shortcut that lets them avoid the "old-fashioned" way. 2. Multiplying by 11: The "Split and Sandwich"
This is arguably the coolest-looking trick in mental math. It works for any two-digit number multiplied by 11. Mental Math Kids Can't Resist!: Tips, Short-cut...
Most kids struggle with numbers that require "carrying" or "borrowing." Friendly numbers make those problems disappear. It feels like a shortcut that lets them
This is how our brains naturally read, so it feels more intuitive than the "stacking" method. 5. Squaring Numbers Ending in 5 This one makes kids look like absolute geniuses. The Trick: To square a number like 25, 35, or 75: The answer always ends in 25. Mental Math Kids Can't Resist!: Tips, Short-cut...