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Mental math Tips: Addition ▫ Subtraction ▫ Multiplication ▫ Division ▫ Sine ▫ Cosine ▫ Tangent  Practice on line: Addition ▫ Subtraction ▫ Multiplication ▫ Division ▫ Root ▫ Exponentiation ▫ Sine ▫ Cosine ▫ Tangent ▫ Fuzzy  
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MENTAL MATH: TiPs & TrIcKs for... Division I Dividing is quite simple, the main key to agility when it comes to solving such operations is knowing the basic divisibility rules of numbers from 2 to 10.


Dividing by 2: if it's an even number. Dividing by 3: if the sum of all digits is
divisible by three, the number is too. Dividing by 4: if the number composed by the last two digits are
divisible by 4, the original number will be as well. 

Dividing by 5: if it ends in 5 or 0. Dividing by 6: if the number is divisible by
2 and 3 it is by 6 as well. More >>





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