# Decimal Numbers Quiz Set 003

### Question 1

What is \$9.326 + 0.7 + 0.03\$?

A

10.056.

B

11.056.

C

12.056.

D

9.056.

Soln.
Ans: a

By simple addition we get \$9.326 + 0.7 + 0.03 = 10.056\$.

### Question 2

What is \$6.062 - (-0.8) + 0.03 - (-0.09)\$?

A

6.982.

B

7.982.

C

5.982.

D

8.982.

Soln.
Ans: a

The given expression is same as \$6.062 + 0.8 + 0.03 + 0.09\$, then by simple addition we get \$6.062 + 0.8 + 0.03 + 0.09 = 6.982\$.

### Question 3

What is \${94 × 9.8 - 73 × 8.9}/8.2\$?

A

\$33{9/82}\$.

B

\$33{7/82}\$.

C

\$33{5/82}\$.

D

\$33{11/82}\$.

Soln.
Ans: a

Observe that all fractional numbers are having one digit to the right of the dot. So we can cancel all the dots and get a plain expression: \${94 × 98 - 73 × 89}/82\$ which equals \${2715/82}\$, which is same as: \$33{9/82}\$

### Question 4

What is \${5.32^2 - 5.65^2}/{5.32 - 5.65}\$?

A

10.97.

B

+0.33.

C

-10.97.

D

-.33.

Soln.
Ans: a

We know \$a^2 - b^2\$ = \$(a - b) × (a + b)\$. So \${a^2 - b^2}/{a - b}\$ is same as a + b. We get a + b = 5.32 + 5.65 = 10.97.

### Question 5

What is 0.0027 × 0.04?

A

\$1.08 × 10^{-4}\$.

B

\$1.08 × 10^{-3}\$.

C

\$1.08 × 10^{-2}\$.

D

\$1.08 × 10^{-5}\$.

Soln.
Ans: a