Interactive Portal-Book of Self-Development Methods
Arithmetic ability - training - test
We are constantly faced with numbers and the need to perform simple mathematical operations in our heads. At home, at work, in the store, or when planning, numbers are everywhere, and the ability to add and subtract often saves time. Of course, it's enough to take a calculator on your phone and find the answer you need, however, this way you deprive yourself of the opportunity to think, and your brain of the opportunity to develop. Adding and subtracting even small numbers helps to strengthen and develop our mental abilities. Here you can train your brain by adding, subtracting, multiplying and dividing small numbers.
© Oleg Akvan
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