Question
20.57 ×28.04 ÷ ? + 254 =
429.06 What approximate value should come in place of question mark (?) in the following questions? (You are not expected to calculate the exact value.)Solution
20.57 ×28.04 ÷ ? + 254 = 429.06 21 ×28 ÷ ? + 254 = 429 21 ×28 ÷ ? = 175 588/(? )= 175 ? = 3.818 ≈ 3
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