Direction: What approximate value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)

(16.05)² + (8.96)² - 7.03 × 3.98 =? + 197.99

Direction: What approximate value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)

1728 ÷ ? + 149.98 × 25.15 = 3156 - 269.75

Direction: What approximate value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)

{(540.34)/(17.99)} ÷ {(29.99)/(449.89)} × {1/(89.78)} = ?

Direction: What approximate value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)

?³ + 115.86 – 24.93 × 1.90 = 190.97

Direction: What approximate value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)

(31.99)^1/5 × (80.78)^1/4 × (5.15)² = ? × 2.29

Direction: What approximate value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)

? × 350.01 ÷ 3.992² = 983 ÷ 14.001

Direction: What approximate value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)

468.02 + 79.91 ÷ 5.01 = ?²

If $${b\over a}=0.7$$ find the value of $${a-b\over a+b}={11\over34}.$$