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Question
Peter went to a coffee shop and saw the menu card. The cost for black coffee is $16 and cappuccino is $32. Help him estimate the total cost if he wants to order both of them.
Peter went to a coffee shop and saw the menu card. The cost for black coffee is $16 and cappuccino is $32. Help him estimate the total cost if he wants to order both of them.
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Solution
The correct option is A $50
Price of the black coffee = $16
Price of the cappuccino = $32
Estimating follows the given rules:
i. If the deciding digit < 5, then round down.
ii. If the deciding digit > 5, then round up.
iii. If the deciding digit = 5, then round up.
Sum of the cost = 16 + 32
Rounding the numbers to the nearest tens, we get:
= 20 + 30
Adding the rounded numbers, we get:
So, the estimated price for both drinks is $50.
Price of the black coffee = $16
Price of the cappuccino = $32
Estimating follows the given rules:
i. If the deciding digit < 5, then round down.
ii. If the deciding digit > 5, then round up.
iii. If the deciding digit = 5, then round up.
Sum of the cost = 16 + 32
Rounding the numbers to the nearest tens, we get:
= 20 + 30
Adding the rounded numbers, we get:
So, the estimated price for both drinks is $50.Suggest Corrections
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