Secondary School (English Medium) (5 to 8) कक्षा ७ - CBSE Question Bank Solutions

To multiply a decimal number by 1000, we move the decimal point in the number to the right by three places.

If `2/3` of a number is 10, then what is 1.75 times of that number?

What is the cost of 27.5 m of cloth at ₹ 53.50 per metre?

Evaluate:

(0.3) × (0.3) – (0.2) × (0.2)

Replace ‘?’ with appropriate fraction.

Replace ‘?’ with appropriate fraction.

If Δ is an operation such that for integers a and b we have a Δ b = a × b – 2 × a × b + b × b (–a) × b + b × b then find (–7) Δ (–1). Also show that (–7) Δ (–1) ≠ (–1) Δ (–7).

Evaluate the following:

(–30) ÷ 10

Evaluate the following:

50 ÷ (–5)

Evaluate the following:

(–36) ÷ (–9)

Evaluate the following:

(– 49) ÷ (49)

Evaluate the following:

13 ÷ [(–2) + 1]

Evaluate the following:

0 ÷ (–12)

Evaluate the following:

(–31) ÷ [(–30) + (–1)]

Evaluate the following:

[(–36) ÷ 12] ÷ 3

Evaluate the following:

[(– 6) + 5)] ÷ [(–2) + 1]

Verify that a ÷ (b + c) ≠ (a ÷ b) + (a ÷ c) for the following values of a, b and c.

a = 12, b = −4, c = 2

Verify that a ÷ (b + c) ≠ (a ÷ b) + (a ÷ c) for the following values of a, b and c.

a = (−10), b = 1, c = 1

20 ÷ _____ = –2

______ ÷ (4) = –3