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Sagot :
To estimate 328 + 231. Round it off to the hundreds when the number that is close to the number is higher than 5 round it up. the solution to your question is:
Step1: Round off the 368 and 231 it will be like this.(400 + 200)
Step 2: Then add the round off given.
Step3: The answer should be 600.
Step 4: Just repeat this equation and you will get the estimated sum
Remember: Its the same equation with Estimating Differences
Step1: Round off the 368 and 231 it will be like this.(400 + 200)
Step 2: Then add the round off given.
Step3: The answer should be 600.
Step 4: Just repeat this equation and you will get the estimated sum
Remember: Its the same equation with Estimating Differences
Round down the digits per place.
Hundreds : 300 + 200 = 500
so we know that the answer is going to be in 500+
Tens : 60 + 30 = 90
so we know that the answer is going to be in 590+
Ones: 8 + 1 = 9
so we know that the answer is going to be in 599
Since the digits do not make a carry (if you know what I mean), or the numbers when combined don't reach 10, it can be solved from the left to the right.
Hundreds : 300 + 200 = 500
so we know that the answer is going to be in 500+
Tens : 60 + 30 = 90
so we know that the answer is going to be in 590+
Ones: 8 + 1 = 9
so we know that the answer is going to be in 599
Since the digits do not make a carry (if you know what I mean), or the numbers when combined don't reach 10, it can be solved from the left to the right.
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