- ARs 160
- BRs 190
- CRs 210
- DRs 140
Step-by-Step Solution
Books: . Stationery: . Spent = 190, so left = . Fraction check: left = , and . ✓ The trap is answering Rs 190, which is the amount spent, not the amount left.
Answer: A) Rs 160
Anita had Rs 350. She spent of it on books and of it on stationery. How much money is left with her?
Class 8Rational NumbersRational Numbers
Key idea: Closure of rationals
Rationals are **closed under addition, subtraction, and multiplication** — the result is always rational.
But **division is closed only if you exclude division by 0**: for any rationals a and b ≠ 0, a ÷ b is rational.
This is more than integers (which weren't closed under division at all) and more than fractions (which sometimes had subtraction lead outside the fractions). Rationals form the smallest 'nice' number system that supports all four basic operations (with the 0-divisor exception).
But **division is closed only if you exclude division by 0**: for any rationals a and b ≠ 0, a ÷ b is rational.
This is more than integers (which weren't closed under division at all) and more than fractions (which sometimes had subtraction lead outside the fractions). Rationals form the smallest 'nice' number system that supports all four basic operations (with the 0-divisor exception).
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More Class 8 Rational Numbers practice
Which of these rational numbers is written in standard form?Compute 2/3 ÷ 4/9 and 4/9 ÷ 2/3. What do the two answers show?What should be subtracted from 3/4 to get -1/2?Meera says the reciprocal of 0 is 0, because flipping 0/1 gives 1/0. Why is she wrong?Which of these rational numbers is the greatest?