Question

Roby went to the market with $\$1000$. He bought a suit for $\$375$, a pair of shoes for $\$155$, and a bag for $\$285$. How much money is left with him? (Round off to the nearest hundred)

• A. $50
• B. $100
• C. $200
• D. $300

Answer 1

The correct option is B $100

Say:
$\bullet$ Estimation is approximating the given value to make the calculation easier.

$\bullet$ Round off the given numbers to the nearest hundred.

Steps:
$\bullet$ How much money does Roby have?
Ans:$\$1000$

$\bullet$ How much money did he spend on buying a suit?
Ans: $\$375$

$\bullet$ What is the estimated value of 375?
Ans: 400 (WB1)

$\bullet$ How much money did he spend on buying a pair of shoes?
Ans: $\$155$

$\bullet$ What is the estimated value of 155?
Ans: 200 (WB1)

$\bullet$ How much money did he spend on buying a bag?
Ans: $\$285$

$\bullet$ What is the estimated value of 285?
Ans: 300 (WB1)

$\bullet$ Which operation do we use to find the total money spent?
Ans: Addition

$\bullet$ How much money did he spend in total?
Ans: $\$400+\$200+\$300=\$900$ (WB2)

$\bullet$ Which operation do we use to find the remaining amount of money?
Ans: Subtraction

$\bullet$ How much money is left with him?
Ans: $\$1,000-\$900=\$100$ (WB3)

WB1:


WB2:


WB3: