Learn one useful method
Start with a clear example and understand why the method works.
Learn strategies that make mental math easier
Each short lesson gives you a practical method, a clear example, and a chance to use it while you play.
Mental math foundations
Build a small set of dependable strategies, then use them while you play.
A simple way to get better
Use each lesson as part of a short cycle. You do not need to finish everything at once.
Use it with fresh questions
Open the matching activity and try the method while you play.
Check what feels easier
Look at your answers and notice which calculations still slow you down.
Come back for the next step
Short, repeated practice helps the method become familiar.
Choose a strategy
Follow the suggested order or open the lesson that helps you right now.
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Lesson 1 Add numbers faster with the make 10 strategy A simple way to solve additions such as 8 + 7 without counting one number at a time. Not started -
Lesson 2 Solve tricky calculations by rounding to an easier number Numbers such as 18, 29, 39, and 98 are close to round numbers. That makes them easier to work with than they may first appear. Not started -
Lesson 3 Make subtraction easier by counting up Instead of counting backwards, start at the smaller number and move forward to the larger one. The jumps between them give you the answer. Not started -
Lesson 4 Turn difficult multiplications into easier ones Halve one number and double the other. The numbers change, but the answer stays the same. Not started -
Lesson 5 Solve the 4 and 8 times tables by doubling Double a number twice to multiply it by 4. Double it three times to multiply it by 8. Not started -
Lesson 6 Use the 10 times table to solve the 9 times table Multiply by 10, then subtract one group of the number you are multiplying. Not started -
Lesson 7 Solve larger exact divisions by splitting them into easy parts Turn one difficult division into two smaller calculations you can solve in your head. Not started