Math Charge Multiplication
Math Charge Multiplication is a times-table sub battle: set each depth charge to the product shown on an enemy sub, fire and dodge torpedoes. Free online.
Falls under: Math Games — this game trains calculation and number sense.
How to play Math Charge Multiplication
- Read the multiplication problem on an enemy sub.
- Enter the product as the depth (number keys or on-screen buttons); press X to clear.
- Press Space or Launch to fire the depth charge.
- Move with A/D or the arrow keys to dodge torpedoes.
About Math Charge Multiplication
Math Charge Multiplication puts your times tables to work on the high seas. Enemy submarines each carry a single-digit multiplication problem, and to sink one you set your depth charge to that problem's product and launch it. Meanwhile, enemy torpedoes are coming for your ship, so you need to keep moving and keep your health above zero for as long as possible. Quick recall matters here: the faster you know the product, the less time a sub has to fire back. Keyboard, mouse and touch controls are all supported.
Because the depth charge has to be set to the product itself, exact recall matters more than estimation here. Squares and the 9s are quick to learn: 6 × 6 = 36, 7 × 7 = 49 and 8 × 8 = 64 can simply be memorised, and a 9 times fact is ten times the number minus the number (9 × 7 = 70 − 7 = 63). With single-digit problems on the subs, that covers a surprising share of the table.
Math Charge Multiplication FAQ
How does Math Charge Multiplication work?
Each enemy submarine carries a single-digit multiplication problem. To sink it, set your depth charge to the product and launch. Meanwhile, enemy torpedoes are coming, so keep moving and keep your health above zero.
Can I play with a keyboard?
Yes. Enter the product with the number keys (press X to clear), fire with Space or the Launch button, and move with A and D or the arrow keys. Mouse and touch controls work too.
What is a quick trick for the 9 times table?
Take the number away from ten times itself: 9 × 7 = 70 − 7 = 63. The digits of each answer from 9 × 1 to 9 × 10 also add up to 9 (18, 27, 36, 45 and so on), which gives you a quick check.
