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What approximate value will come in place of question (?) in the following given expression? You are not expected to  calculate the exact value.

29.98% of 549.99 = ? - 254.97 + 79.98% of 74.99 

What approximate value should come in the place of (?) in the following questions?

42.98% of 849 + 18.45% of 1201 ≈ ?

6940 ÷ 28 ÷ 7 = ?

194.95 + 3.98 × 64.99 - ? = (10.99 + 9.02)²

What is the area (in cm²) of a square inscribed in a circle with a radius of 10√2 cm?

(√8648 ×7) ÷ (3.9 ×5.99) = ?

7480 ÷ 16.98 – 34.32 ÷ (4.99/99.9) = ?

3.99² + (3.01 × 2.98) + ? = 225.03