3rd grade
posted by amanda .
Use compatible numbers to complete this problem. Then estimate the sum.
3,428
+432
_____

What numbers are 3428 and 432 fairly close to? Once you come up with those, then you should be able to add in your head and estimate the answer.
3428  fairly close to 3400
432  fairly close to 450
When you add those two in your mind, you should get 3850. 
3860
Respond to this Question
Similar Questions

3rd grade math
how do you tell what compatible numbers you would use and theh add example $2.75+$5.35 
3rd grade
my dauter have a math problem and I don't no how to help her. this is the question: estimate each diffirence using compatible numbers for exc. 5324=30 the next is 34678=? 
3rd grade
Please explain what you do when asked to use compatible numbers. 
Math3rd grade
Round to estimate the sum of all the numbers in 14. 
4th grade math
explain why it can be better to use compatible numbers to estimate rather than rounding. 
algebra worde problem
when would you use compatible numbers to estimate the value of an expresssion? 
Halp me or i fall
Write the number that makes the statement true. 1. 205.5 m = _____ mm (1 point) 205,500 0.2055 20.55 20,550 2. 199.2 km = _____ m (1 point) 199,200 19.92 19,920 0.1992 Use benchmarks to estimate the sum. 3. + (1 point) 2 1 0 Estimate … 
3rd grade math
sara wants to know how many boxes of cookies her entire girl scout troop sold. How could she use compatible numbers to find the sum? 
5th grade math
how can you use compatible number to estimate 14675 divided by 7 so that the estimate is greater that the actual quotient? 
math
Write the number that makes the statement true. 1. 205.5 m = _____ mm (1 point) 205,500 0.2055 20.55 20,550 2. 199.2 km = _____ m (1 point) 199,200 19.92 19,920 0.1992 Use benchmarks to estimate the sum. 3. + (1 point) 2 1 0 Estimate …