Approximation Test-5 (Approximation of decimal figures)

Answer: Option B

Explanation

Given,

(13.96)²-(15.03)²+(18.09)²-32.65=?

It can also be approximated as

(14)²-(15)²+(18)²-2=?

= 196-225+324-32

= 196+324-225-32

= 520-257

= 263 ≈ 264

Hence, option B is correct.

Answer: Option A

Explanation

Given,

4433.764-2211.993-1133.667+3377.442 = ?

It can aslo be approximated as

4400-2200-1150+3400=?

= 4400+3400-2200-1150

= 4400+50

= 4450 ≈ 4466

Hence, Option A is correct.

Answer: Option C

Explanation

Given,

16.978+27.007+36.984-12.969-9.003 =?

It can aslo be approximated ass

16.978+27+37-13-9=?

= 17+27+37-(13+9)

= 81-22

= 59 ≈ 60

Hence, Option C is correct.

Answer: Option D

Explanation

Given,

$\sqrt{8939}\times (5.96{)}^2=?$

It can also be approximated as

$\sqrt{8936}\times (6{)}^2=?$

 = 94×36

= 3384 ≈ 3400

Hence, option D is correct.

Answer: Option D

Explanation

Given,

4734.96 - 3454.03- 1612.96 =?- 161143

It can aslo be approximated as

4700-3500-1600=?-1600

= 1200=?

=1200 ≈ 1150

Hence, Option D is correct.