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For classroom use, Mental Math Free is a good idea for kids who need to speed up math calculation. If learned and practiced, the nine mental math techniques –- subtraction, multiplication of various sets, square roots, some algebra-related mental math tricks, factorization, and division –- can help kids calculate math problems more quickly. Mental Math Free is also good for helping kids brush up on their multiplication tables or challenging them to learn tables for higher numbers. A downside of the app is that there are no individual profiles for students to track their progress.Continue reading Show less
Mental Math Free is a simple mental math practice and trick-teaching app to help middle and high school students solve math problems more quickly. Younger kids can practice their multiplication tables, while older kids can use the techniques list to learn nine mental math tricks. Training questions and the app's game, “Flash Calc,” help kids practice their skills.
First, tap an option: Times Tables, Techniques, Training, or “Flash Calc.” For Times Tables, set the practice range (for example, to practice times tables 2 through 15, set the left number at 2, then set the range 1 ~ 15 with the next two numbers). Then tap Start to begin solving problems by entering the answers in a number keypad. Tap Techniques to see a list of mental math tricks; tap on one item to view its instructions. Training is practice of the techniques. “Flash Calc” is a quick calculation game where players see 3, 5, 10, or 15 numbers (positive or negative) in a row and must enter the correct total at the end.
Kids learn by drilling themselves on Mental Math Free's multiplication tables and by reading and memorizing the techniques, practicing them during Training, and testing themselves in the “Flash Calc” game. The Training portion doesn't allow an incorrect answer to a question. Rather, the screen just remains static until a kid enters another answer. The app provides good information and solid practice for middle and early high school math students, but it's nothing special.
Note: ads run along the bottom of this app; the developer states that tapping an ad will make the ads disappear for 24 hours.
Key Standards Supported
Expressions And Equations
Use square root and cube root symbols to represent solutions to equations of the form x2 = p and x3 = p, where p is a positive rational number. Evaluate square roots of small perfect squares and cube roots of small perfect cubes. Know that √2 is irrational.
Number And Operations In Base Ten
Fluently add and subtract multi-digit whole numbers using the standard algorithm.
Multiply a whole number of up to four digits by a one-digit whole number, and multiply two two-digit numbers, using strategies based on place value and the properties of operations. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.
Fluently multiply multi-digit whole numbers using the standard algorithm.
Find whole-number quotients of whole numbers with up to four-digit dividends and two-digit divisors, using strategies based on place value, the properties of operations, and/or the relationship between multiplication and division. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.
The Number System
Fluently divide multi-digit numbers using the standard algorithm.