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31.87 + 87.80 – 55.11 = 12.84 × ? – 25.881). 72). 43). 104). 9 |
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Answer» Given expression is, 31.87 + 87.80 – 55.11 = 12.84 × ? – 25.88 We can WRITE the given values as: 31.87 ≈ 32 and 87.80 ≈ 88 55.11 ≈ 55 and 12.84 ≈ 13 and 25.88 ≈ 26 Then, ⇒ 32 + 88 – 55 = 13 × ? – 26 ⇒ 120 – 55 = 13 × ? – 26 ⇒ 65 = 13 × ? – 26 ⇒ 65 + 26 = 13 × ? ⇒ 13 × ? = 91 ⇒ ? = 91/13 ⇒ ? ≈ 7 |
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