Use the Box Method to multiply place-value energy blocks and power up 20 incredible city buildings!
Master the essential math skills that power the Box Method! Drill basic facts, master the Zero Trick, split numbers by place value, and add partial sums.
Sharpen your box multiplication skills with infinite practice problems!
Race against the clock to solve as many box multiplication problems as you can! Build answer streaks to trigger 2x, 3x, and 4x score multipliers!
Timer counts down non-stop while you solve boxes.
Completing a box instantly awards bonus points and loads the next puzzle!
Solve without mistakes to boost scores up to 4x!
Enter any two numbers to generate a custom interactive Area Model grid!
Multiplying big numbers like 35 × 24 sounds tricky in your head, but it's super easy when you break numbers apart into Tens and Ones! Imagine drawing a house blueprint with rooms: each room multiplies a simple top number by a side number.
Split each number by place value:
Write 30 and 5 on top, and 20 and 4 on the left side!
Multiply each row by its column to find the partial product in each room:
Stack and add all four room answers together:
Therefore: 35 × 24 = 840! 🎉
Earn badges by building city landmarks, scoring streaks, and mastering partial products!