Simplest fraction: The numerator and denominator are fractions of prime numbers, which are called simplest fraction.
Note: In addition to time-sharing, try to calculate by mouth, and generally use the common divisor of the numerator and denominator (except 1) to remove the numerator and denominator of the fraction; Usually, we have to separate it until we get the simplest score.
★ If you can see the greatest common divisor of numerator and denominator quickly, it will be easier to divide them directly.
Writing:
2
six
12
—
30
15
five
(The divisor is crossed out, such as 6, 12, 30, 15 in this example).
References:
1. Primary School (West Normal University Edition) Mathematics Volume 10
2. The fifth grade mathematics in primary school (Volume II)