Riya claims that for all rational numbers a and b, a - b = b - a. She tests a = 7/5, b = 2/5. Use this example to decide whether her claim is true, and pick the correct conclusion.

Question

Accepted Answer

False, since 7/5 - 2/5 = 1 but 2/5 - 7/5 = -1. 7/5 - 2/5 = 5/5 = 1, while 2/5 - 7/5 = -5/5 = -1. Since 1 is not equal to -1, subtraction is not commutative.

Riya claims that for all rational numbers a and $b, a - b = b - a$ . She tests $a = \frac{7}{5}, b = \frac{2}{5}$ .
Use this example to decide whether her claim is true, and pick the correct conclusion.

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More Class 8 Properties of Rational Numbers practice

Riya claims that for all rational numbers a and b,a−b=b−a. She tests a=57​,b=52​.Use this example to decide whether her claim is true, and pick the correct conclusion.

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 8 Properties of Rational Numbers practice

Riya claims that for all rational numbers a and $b, a - b = b - a$ . She tests $a = \frac{7}{5}, b = \frac{2}{5}$ .
Use this example to decide whether her claim is true, and pick the correct conclusion.