Mental math tricks - so you expect fast without a calculator

Mental math tricks - so you expect fast without a calculator


Mental math tricks: Can you deal with numbers?

Mental math tricks: Quick and easy without a calculator

Mental arithmetic increases brain power. The overturning of numbers forms a good basis for mental math tricks.

  • The basics you learned in elementary school. With the numbers 5 and 10 you can add up. Convert at double-digit multiplications always only the number (example: 27 * 34 = (20 * 34) + (7 * 34) = 918 or (27 * 30) + (27 * 4) = 918)
  • In addition, you can round and to estimate because the calculator is not always right. How do you proceed for example, if you add 4-digit numbers? About Beat and then calculate exactly. In general, you must always add up only 2 digit numbers. Imagine depicts the computation spelling before and count each of the numbers below each other standing together. For the subtraction pull the numbers from each other.
  • Also in the division, you can estimate whether the numbers is divisible by the divisor. If not, you can estimate the range.
  • Train your performance and calculate in your head - so you save even typographical error in the calculator.
  • Basis for mental math tricks is safe use in hundreds of area - so you can also be applied to larger numbers. And if you roll over the result, you have a tendency!
  • Note: Each count in his individual way. Search for herself useful clues.
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