Estimating sum

What is the estimated sum of 45 + 67?
100
110
120
130
Which method can be used to estimate sums?
Counting on fingers
Rounding numbers
Memorization
Guessing
What is the estimated sum of 89 + 73?
150
160
170
180
When estimating a sum, what should you do with the numbers?
Add them together exactly
Round them to the nearest ten or hundred
Subtract one from the other
Multiply them together
What is the estimated sum of 123 + 456?
500
600
700
800
How can estimation help in everyday life?
It saves time and helps make quick decisions
It's not useful at all
It confuses people
It's only for math class
What is the estimated sum of 234 + 567?
700
800
900
1000
Why is it important to learn how to estimate sums?
It's not important
It helps improve mental math skills
It's too difficult to learn
It's only for advanced students
What is the estimated sum of 345 + 678?
1000
1100
1200
1300
Can estimation be used for subtraction as well?
Yes
No
Only for multiplication and division
It depends on the numbers
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