Question

Box A has 54 bottles and each bottle contains 114 mL of chemical. Box B has 48 bottles and each bottle contains 101 mL of chemical. Which box contains more chemicals? (By rounding off to the nearest tens)

• A. Box B
• B. Box A

Answer 1

The correct option is B Box A

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

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

Steps:
$\bullet$ How many bottles does box A have?
Ans: 54

$\bullet$ What is the estimated value of 54?
Ans: 50 (WB1)

$\bullet$ How much chemical does each bottle contain?
Ans: 114 mL

$\bullet$ What is the estimated value of 114?
Ans: 110 (WB1)

$\bullet$ What is the total volume of chemical in Box A?
Ans: 110 × 50 = 5,500 mL (WB2)

$\bullet$ How many bottles does Box B have?
Ans: 48

$\bullet$ What is the estimated value of 48?
Ans: 50 (WB3)

$\bullet$ How much chemical does each bottle contain?
Ans: 101 mL

$\bullet$ What is the estimated value of 101?
Ans: 100 (WB3)

$\bullet$ What is the total volume of chemical in box B?
Ans: 100 × 50 = 5,000 mL (WB4)

$\bullet$ Which box has the most volume of chemicals?
Ans: As 5,500 > 5,500

Hence, Box A contains more chemicals.

WB1:


WB2:


WB3:


WB4: