Q1. 420 ÷ 28 × 288 ÷ 32 = ?

Explanation:

420/28 x 288/32

=15x9

=135

Q2. 83% of 2350 = ?

Explanation:

83/100 x 2350

=8.3 x 235

=1950.50

Q3. 25639 – 5252 – 3232 =?

Explanation:

25639-8484

=17155

Q4. 32.25 × 2.4 × 1.6 = ?

Explanation:

32.25x3.84

=123.84

Q5. 4.3 + 43.34 + 34.43 + 43.43 + 3.4 = ?

Explanation:

?=128.9 = 129 approx

Q6. 125% of 200 + 36% of 350 = ?

Explanation:

125/100 x 200 + 36/100 x 350

=125 + 126

=251

Q7. 136 × 68 ÷ 17 = ?

Explanation:

136 x 68/17

=136x4

=544

Q8. (square root of 32 + square root of 128)×square root of 2=?

Explanation:

(5.65 +11.31)x 1.414

=16.96 x 1.414

Use apprxmiation,

=17x1.5

=25.5

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