Divide by 25
Divide by 25 by multiplying by 4, then dropping two zeros.
800 ÷ 25 = 32
Every 100 holds four 25s, so 8 hundreds hold 8 × 4 of them.
Drop the two zeros: 8. Then ×4 by doubling twice: .
Your turn
Three to try in your head — tap what you get.
300 ÷ 25
2150 ÷ 25
1225 ÷ 25
All 36 shortcuts: the Magic Tricks library.