Question

(7²÷200-0,4²) ÷0,5³=

Answer 1

(7² ÷ 200 - 0,4²) ÷ 0,5³ = (49/200 - 4/25)÷1/8 = (49/200 - 32/200) ÷ 1/8 = 17/200 ÷ 1/8 = 17/200 × 8 = 17/25 ≈ 0,68

Answer 2

Let's break down the calculation step by step:

1. Calculate $7^2$ (7 squared): $7^2 = 49$

2. Divide $49$ by $200$: $\frac{49}{200} = 0.245$

3. Calculate $0.4^2$ (0.4 squared): $0.4^2 = 0.16$

4. Subtract $0.16$ from $0.245$: $0.245 - 0.16 = 0.085$

5. Calculate $0.5^3$ (0.5 cubed): $0.5^3 = 0.125$

6. Divide $0.085$ by $0.125$: $\frac{0.085}{0.125} \approx 0.68$

So, $(7^2 \div 200 - 0.4^2) \div 0.5^3 \approx 0.68$.