Answer:
265 - Normal
----- (Will tell how to use the answers in the end)
270 - Estimated
Explanation:
'About' (Estimation):
"Beats its wings 'ABOUT' 53 times each second"
First, we are starting with the estimations, 53 rounded to the nearest ten is 50.
" 'ABOUT' how many times does a ruby-throated hummingbird beats its wings in 5 seconds"
The nearest ten is 10.
(QR *Quick Reminder*: If the estimation is like '5' then it goes to the next/the greater number.
Example:
10 ----------- 5 ------------ 15
--------->
-----------------------------------------------------------------------------------------------------------------
Addition:
Now that we have found the estimated amount of the seconds, we will add them together.
50
+ 5
55
55 = Estimated is 60.
Let's multiply the normal numbers now!
53
+ 5
58
58 = Estimated is 60.
Great! Now we got 55 and 53 (Can be 60 *55's and 58's estimate* if supposed to estimate)
-----------------------------------------------------------------------------------------------------------------
Multiplication:
Now, we multiply!
Estimated Multiply:
50
x 10
500
Normal Multiply:
53
x 5
265
Estimated Normal Multiply:
265
-------- So these can be your answer!
270
-----------------------------------------------------------------------------------------------------------------
How to use the answers: (answers are above)
265 - Normal:
Only use it when the directions don't say anything but to solve the problem.
270 - Estimate:
Only use it when the directions tell you to estimate.
265 and 270 - Both:
Only use it when the directions tell you to solve the problem and estimate.
(Quick Hint: In some of the question passages, they replace estimate with some other words that also talk about rounding.)
-----------------------------------------------------------------------------------------------------------------
Hope this helped and have a great day!