✖️ Doubling 📚 Grade 2-3 ⏱ 5 min
Doubling and Halving: A Fast Shortcut
Doubling and halving are the fastest mental math shortcuts, and they give the entire times-2 multiplication table for free.
Doubling — add a number to itself
Doubling 7 means 7+7=14, the same as 7×2. Kids who double quickly automatically get the whole times-2 table.
💡 Practice: double numbers 1-10 daily until instant — this one skill unlocks fast mental math across many other topics.
Halving — split into two equal groups
Halving 14 means splitting it into two equal groups of 7 — the reverse of doubling, and the base of division by 2.
FAQ
Why teach doubling before the full times table?
Doubling builds on addition already known, making it the easiest entry point into multiplication.