Addition & Subtraction of Decimals

Q. Maya wants to put parentheses in
$77-24+18÷7$ to make it equal to $71$.
Which among the following options would be correct for her?

Note: Parentheses means brackets.

1. $(77-24)+18÷7$
2. $77-24+(18÷7)$
3. $77-(24+18)÷7$

Q.

Evaluate: 1 + 6 ÷ 3 - (4 + 5) × 7.

1. -6
2. -60
3. 6
4. 60

Q.

Find $0.56÷10$

Q. Match the following.

1. 7.7
2. 1.62
3. 8.27
4. 7.5

Q.

Melissa bought groceries worth Rs39.46 from a store. She paid Rs50 and the cashier gave her Rs1.46 back in change. How much more money should she get?

1. Rs9.02

2. Rs10.08

3. Rs9.46

4. Rs9.08

Q. Adding $\frac{-4}{7}$ to $\frac{10}{14}$, we get the sum as _____

1. $\frac{18}{14}$
   
2. $\frac{-2}{14}$
   
3. $\frac{-18}{14}$
   
4. $\frac{2}{14}$
   

Q.

7.34 - 2.88 - 1.33 = ________

1. 3.13

2. 4.23

3. 2.23

4. 2.13

Q. Add the fractions $\frac{3}{8}and\frac{2}{3}$.

Q. Solve: $\frac{4}{9}+\frac{2}{7}$

Q.

24.95 + 11.83 = __________

1. 36.78

2. 34.67

3. 37.87

4. 38.67

Q.

Solve the equation. Check your solution.

$\mathrm{l}+15.2=-4.5$

Q. Add the fractions $\frac{3}{8}and\frac{2}{3}$.

1. $\frac{25}{24}$
2. $\frac{20}{24}$
3. $\frac{24}{25}$
4. $\frac{18}{24}$

Q. Maya wants to put parentheses in
$77-24+18÷7$ to make it equal to $71$.
Which among the following options would be correct for her?

Note: Parentheses means brackets.

1. $(77-24)+18÷7$
2. $77-24+(18÷7)$
3. $77-(24+18)÷7$

Q. $\frac{1}{3.5}+\frac{1}{5.7}+\frac{1}{7.9}+..............+\frac{1}{(2n+1)(2n+3)}=\frac{n}{3(2n+3)}$

Q. 4.25-2.63 =

1. 0.62
2. 1.62
3. 6.88

Q. Simplify $\frac{825}{12.50}$.

Q. Represent the following numbers as inegers with appropriate signs.

(a) An aeroplane is flying at a height two thousand metre above the ground.
(b) A submarine is moving at a depth, eight hundred metre below the sea level.
(c) A deposit of rupees two hundred.
(d) Withdrawal of rupees seven hundred.

Q. The difference of two numbers is 28.38. If the smaller number is 8.38, then what is the bigger number?

1. 20
2. 36.76
3. 26.67
4. 35.25

Q. Raju has 78 rupees 53 paise and Ramu has 96 rupees 74 paise. What is the total amount they have?

Q. The quotient of $x$ by $8$ is multiplied by $y$.

Q. What is the number obtained when 12 is subtracted from 7?

1. 7
2. 5
3. 3
4. -5

Q. Add the fractions $\frac{3}{8}and\frac{2}{3}$.

Q. A cross-country relay race was arranged between the two towns of Usmanpur and Rampur. Each participant ran $750m$ with a flag and handed over the flag to the next runner. If $62$ participants ran this distance from the starting point to the finishing point, what is the total distance travelled by them? Given the answer in kilometers?

Q. Add the fractions $\frac{3}{8}and\frac{2}{3}$.

Q. The division of $\frac{18}{6}$ is

1. 4
2. 6
3. 2
4. 3

Q.

Express $77$ m as kilometres using decimals.

Q.

Evaluate

$0.55-0.3$

Q. How many multiples of $5$ are there from $10$ to $95$?

1. $18$
2. $16$
3. $20$
4. $17$

Q. Find $n$, if:
$\frac{n!}{3!(n-3)!}:\frac{n!}{5!(n-5)!}=5:3$

Q.

Find the sum of $241.86+40+3.01+0.145$ ?