Mental math: x10, x100, x1000, /10, and decimal tenths
Use mental math strategies to multiply by 10, 100, and 1000, divide by 10, and add or subtract decimal tenths. Unlimited questions, five difficulty levels, and a full worked solution every time — free.
Try one
Multiply using a mental math pattern.
84 · 100
Answer: 8400
See one solved, step by step
Multiply using a mental math pattern.
7 · 1000
📘 Worked solution
17 · 1000 = 7000Multiplying by 1000 adds three zeros on the end -- every digit moves three places to the left.
Ready to master it?
Jump into unlimited practice — your Winny Score tracks you to 100. And if it won't click, a real tutor will make it click: first lesson free.
Start practicing