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A simple fraction (also known as a common fraction or vulgar fraction) [n 1] is a rational number written as a/b or , where a and b are both integers. [9] As with other fractions, the denominator (b) cannot be zero. Examples include 1 / 2 , − 8 / 5 , −8 / 5 , and 8 / −5 .
Addition of fractions is much simpler when the denominators are the same; in this case, one can simply add the numerators while leaving the denominator the same: + = +, so + = + =. [ 63 ] The commutativity and associativity of rational addition is an easy consequence of the laws of integer arithmetic. [ 64 ]
A subtraction problem such as is solved by borrowing a 10 from the tens place to add to the ones place in order to facilitate the subtraction. Subtracting 9 from 6 involves borrowing a 10 from the tens place, making the problem into +. This is indicated by crossing out the 8, writing a 7 above it, and writing a 1 above the 6.
Counting is a type of repeated addition in which the number 1 is continuously added. [46] Subtraction is the inverse of addition. In it, one number, known as the subtrahend, is taken away from another, known as the minuend. The result of this operation is called the difference. The symbol of subtraction is . [47]
Didi & Ditto Kindergarten: A Feast for Zolt is the first title of the Didi & Ditto educational software series created by Kutoka Interactive.Release in 2003 in Canada and the United States, the game teaches kindergarten notions to children between 4 and 6 years old. [3]
The game sees the Blaster Pal characters head to the Plusto galaxy in outer space to solve maths problems. By solving addition and subtraction problems, they earn printable certificates. [3] The game contains several activities, puzzles, and songs. The game is intended to encourage "math readiness". [4]
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