Four Basic Operations on Rational numbers

1.	Addition of various digits
2.	Subtraction of Rational numbers
3.	Multiplication of Rational numbers
4.	Division of rational numbers

1.	Addition with same denominator Difficulty: easy	2
2.	The sum of the negative fraction if the denominators are the same Difficulty: easy	3
3.	Divide a fraction by integer Difficulty: easy	2
4.	Multiplication of a rational number Difficulty: medium	4
5.	The sum of negative mixed numbers Difficulty: medium	4
6.	Find the required number Difficulty: medium	4
7.	Multiplication of a mixed number Difficulty: medium	2.5
8.	Divide and multiply Difficulty: medium	3
9.	Multiplication of two fractions Difficulty: medium	2
10.	Calculate the required number Difficulty: medium	4
11.	Negative value added to the real rational number Difficulty: medium	4
12.	Multiplication of three rational numbers Difficulty: medium	3
13.	Divide a mixed number by a positive or negative integer Difficulty: medium	3
14.	Subtract the negative part from the fraction Difficulty: medium	2
15.	Divide the mixed number Difficulty: medium	3
16.	Division and multiplication of rational numbers(text format) Difficulty: medium	2
17.	Divide an integer by a real fraction Difficulty: medium	2
18.	Road, speed, time (rational numbers) Difficulty: hard	5
19.	Calculate the unknown additive from the sum Difficulty: hard	5
20.	Mixed number and integer (negative numbers) Difficulty: hard	4
21.	Rational expression (difference) Difficulty: hard	6
22.	Rational expression substitution Difficulty: hard	7

Training

Difficulty: easy

Methodical recommendation

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