Approximation Test-3 (Approximation of decimal figures)

Answer: Option D

Explanation

Given,

5998÷9.98+670.99-139.99=?

It can be approximated as

5998÷9.98+670.99-139.99=?

= 6000÷10+670-140=?

= 600+530

[ applying BODMAS rule]

= 1130

Hence, OptionD is correct.

Answer: Option C

Explanation

Given,

5466.97-3245.01+1122.99

It can be approximated as

5500-3200+1100=? +2300

   3400= ?+2300

   = 3400-2300

    = 1100

Hence, Option C is correct.

Answer: Option B

Explanation

Given,

(4.012)³+(29.997)²=?

It can be approximated as

(4)³+(30)²=?

= 64+900

= 964 ≈ 965

Hence, Option B is correct.

Answer: Option C

Explanation

Given,

$\frac{5}{8}\text{\hspace{0.17em}of 4011.33+}\frac{7}{10}\text{\hspace{0.17em}of 3411.22=?}$

It can be approximated as

$\frac{5}{8}\text{\hspace{0.17em}of 4000+}\frac{7}{10}\text{\hspace{0.17em}of 3400=?}$

= 5×500+7×340

= 2500+2300

= 4880 ≈ 4890

Hence, Option C is correct.

Answer: Option B

Explanation

Given,

441.01 - 232.99+ 1649.99 =?+ 1225.92

It can be approximated as

440 - 230+ 1650 =?+ 1225

= 210+1650=?+1225

= 1860= ?+1225

= 1860-1225

= 635 ≈ 630

Hence, Option B is correct.