A tank had 736 liters of water. If 264 liters of water is used, then how many liters of water will be left in the tank? (Estimate to the nearest tens)

490 L

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480 L

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500 L

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460 L

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Solution

The correct option is B 480 L
Say:
$∙$ Estimation is approximating the given value to make the calculation easier.

$∙$ Round off the given numbers to the nearest tens.

Steps:
$∙$ How many liters of water is there in the tank?
Ans: 736 L

$∙$ What is the estimated value of 736?
Ans: 740 L (WB1)

$∙$ How many liters of water is used?
Ans: 264 L

$∙$ What is the estimated value of 264?
Ans: 260 L (WB1)

$∙$ Which operation is used to find the volume of leftover water in the tank?
Ans: Subtraction

$∙$ How many liters of water is left in the tank?
Ans: 740 - 260 = 480 L (WB2)

WB1:

WB2:

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