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Question

Laika wants to beat her friend Jessie in a running competition. So, Laika plans to run daily in the early morning. If Laika burns 503 calories per day while running in the morning, then calculate how many calories would be burnt by Laika in 2,190 days?

A
1,101,570 calories
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B
1,570,101 calories
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C
1,570,110 calories
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Solution

The correct option is A 1,101,570 calories
Calories burnt by Laika in 1 day =503 calories

Calories burnt by Laika in 2,190 days =2,190×503 calories

2,190×503 can be evaluated as:

First, we would multiply the units digit of 503, i.e., 3 with 2,190.


Now, we would multiply the tens digit of 503, i.e., 0 with 2,190.


Now, we would multiply the hundreds digit of 503, i.e., 5 with 2,190.

Finally, we would add 6570, 00000 and 1095000 to get the answer.





Calories burnt by Laika in 2,190 days would be 1,101,570 calories.

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