## Approximation

#### 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).

1. 26.823 x 27.923 x 4.5001 = ?
1. 3500
2. 3450
3. 3100
4. 3400

1. 26.823 x 27.923 x 4.5001
≈ 27 x 28 x 4.5000

##### Correct Option: D

26.823 x 27.923 x 4.5001
≈ 27 x 28 x 4.5000 = 756 x 4.5000 = 3402 ≈ 3400

1. 3739 + 164 x 27 = ?
1. 105400
2. 4000
3. 8200
4. 690

1. 3739 + 164 x 27 = ?
? = 3739 + 4428 = 8167

##### Correct Option: C

3739 + 164 x 27 = ?
? = 3739 + 4428 = 8167 ≈ 8200

1. 21 + 3.7 x 2.9 = ?
1. 74
2. 70
3. 27
4. 32

1. 21 + 3.7 x 2.9 = ?
? ≈ 21+ 4 x 3

##### Correct Option: D

21 + 3.7 x 2.9 = ?
? ≈ 21+ 4 x 3 ≈ 21 + 12 ≈ 33 ≈ 32

1. (21 + 99) x (30 - 19.02) = ?
1. 3581
2. 131
3. 1290
4. None of these

1. (21+ 99) x (30 - 19.02)
≈(21+ 99 ) x (30 - 19)

##### Correct Option: D

(21+ 99) x (30 - 19.02)
≈ (21+ 99 ) x (30 - 19)
≈ 120 x 11 = 1320

1. 198.001 x 25 + 112.05 x 24.998 = ?
1. 7570
2. 7550
3. 7500
4. 7750

1. ? = 198.001 x 25 + 112.05 x 24.998
= 198 x 25 + 112 x 25

##### Correct Option: D

? = 198.001 x 25 + 112.05 x 24.998
= 198 x 25 + 112 x 25
= 25(198 + 112)
= 25 x 310 = 7750