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71.88 × 3.90 + 11.90 = 67.95 + ? × 4.151). 282). 183). 584). 43 |
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Answer» Given expression is, 71.88 × 3.90 + 11.90 = 67.95 + ? × 4.15 We can write the given values as: 71.88 ≈ 72 and 3.90 ≈ 4 11.90 ≈ 12 and 67.95 ≈ 68 and 4.15 ≈ 4 Then, ⇒ 72 × 4 + 12 = 68 + ? × 4 ⇒ 288 + 12 = 68 + ? × 4 ⇒ 300 = 68 = ? × 4 ⇒ 300 - 68 = ? × 4 ⇒ 232 = ? × 4 ⇒ ? = 232/4 ⇒ ? ≈ 58 |
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