Approximation Test-4 (Approximation of decimal figures)

Answer: Option B

Explanation

Given,

30.003×17.998+63.010

It can be approximated as 

30×18+63=?

= 540+63

= 603 ≈ 600

Hence, option B is correct.

Answer: Option B

Explanation

Given,

(23.001)²=?

It can be approximated as

= (23)²

= 529 ≈ 530

Hence, Option B is correct.

Answer: Option D

Explanation

Given,

919.999÷25.002×13.996=?

Its can be approximaed as

920÷25×14=?

= 37×14

= 518 ≈ 515

Hence, Option D is correct.

Answer: Option B

Explanation

Given,

1212.12 + 2121.21 + 1122.22 = ?

It can be approximated as

1200+ 2120 + 1120 = ?

= 4440 ≈ 4455

Hence, Option B is correct.

Answer: Option C

Explanation

Given,

33.0003% of 509.999 =?

It can be approximated as

33% of 510=?

= $?= \frac{1}{3}\times 510=170$

Hence, option C is correct.