Approximation Test-4 (Approximation of decimal figures)

Answer: Option D

Explanation

Given,

29.8% of 260+ 60.01% of 510-103.57=?

It can be approximated as

= $\frac{30}{100}$×260+60% of 500-100=?

= 30×2.6+60×5-100

= 78+300-100

= 278 ≈ 280

Hence, option D is correct.

Answer: Option A

Explanation

Given,

(21.98)²-(25.02)²+(13.03)²=?

It can be aprroximated as

(22)²-(25)²+(13)²=?

= 484-625+169

= 484+169-169

= 28 ≈ 25

Hence, Option A is correct.

Answer: Option D

Explanation

Given,

9228.789- 5021.832+ 1496.989= ?

It can be approximated as

9230-5000+1500=?

= 9200+1500-5000

= 5700

Hence, Option D is correct.

Answer: Option D

Explanation

Given,

11.003×19.998×9.010=?

It can be approximated as

11×20×9=?

= 99×20

= 1980

Hence, Option D is correct.

Answer: Option C

Explanation

Given,

8399.999÷375.002×14.996=?

It can also be approximated as

8400÷400×15

= 21×15

= 315

= 335

Hence, Option C is correct.