Approximation
Direction: What approximate value should come in place of the question mark(?) in the following question ? (Note that you are not expected to calculate the exact value).
- 6.39 x 128.948 + 5.215 ÷ 12.189 + 25.056 = ?
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? = 6.39 x 128.948 + 5.215 ÷ 12.189 + 25.056
= 639 x 128.948 + 5.215 x (1/12.189) + 25.056Correct Option: C
? = 6.39 x 128.948 + 5.215 ÷ 12.189 + 25.056
= 639 x 128.948 + 5.215 x (1/12.189) + 25.056
= 823.97772 + 0.427844778 + 25.056
= 849.4615648 ≈ 852
- 724 ÷ 25 x 31.05 + 101 = ?
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724 ÷ 25 x 31.05 + 101 = ?
⇒ ? = 725 ÷ 25 x 31 + 101Correct Option: B
724 ÷ 25 x 31.05 + 101 = ?
⇒ ? = 725 ÷ 25 x 31 + 101
= 29 x 31+ 101
= 899 + 101 = 1000
- 1010 ÷ 36+187 x 20.05 = ?
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b ? = 1010 ÷ 36 + 187 x 20.05
= 28.0555 + 3749.35Correct Option: B
b ? = 1010 ÷ 36 + 187 x 20.05
= 28.0555 + 3749.35 = 3777.40 ≈ 3770
- 56.001 x ? - 1000.999 = 231
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56.001 x ? - 1000.999 = 231
⇒ 56 x ? - 1001 = 231Correct Option: A
56.001 x ? - 1000.999 = 231
⇒ 56 x ? - 1001 = 231
⇒ 56 x ? = 231 +1001 = 1232/56 = 22
- 30.9 x 3000 - 10.1 x 1100 + 8298- 4302 = ?
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? = 30.9 x 3000 -10.1 x 1100 + 8298 - 4302
= 92700 - 11110 + 8298 - 4302Correct Option: D
? = 30.9 x 3000 -10.1 x 1100 + 8298 - 4302
= 92700 - 11110 + 8298 - 4302
= 92700 - 11110 + 8298 - 4302
= 85586 ≈ 85000
