Use rounding to Estimate Sums
457+322
500+300=800
or
460+320=780
Estimate the sum of 429+491
430+480=910
400+500=900
In the following number , which digit is in the ones place value:
724
4
round 63 to the nearest 10
60
45-27=
18
881+152
900+200=1,100
or
880+150=1,030
Estimate the sum of 327 + 581
330+580=910
300+600=900
Marvella writes the addition problem 5+6. Is the sum even or odd?
Odd
Round 155 to the nearest 10 and 100
Nearest ten: 160
Nearest hundred: 200
452-345=
107
Jack read 72 pages on Sunday and 83 pages on Monday. About how many pages did Stephanie read during the two days?
Round to the nearest 10
70+80=150
Estimate the sum of 421+218
420+220=640
Or about 650
Jon and Berto played PlayStation for 342 minutes on Tuesday. On Wednesday, they played for 257 minutes. How many total minutes did they play?
599
Mia's baseball is 32 inches long. What is its length rounded to the nearest 10 inches?
30
552-346=
206
475+438
500+400=900
or
480+440=920
Estimate the sum of 428+286
430+290=720
400+300=700
Alondra and Bridget went to the state fair. Alondra spent 53 minutes on the carousel, and Bridget spent 26 minutes. How many total minutes did they spend?
53+26=79
Round 172 to the nearest Hundred
200
82-48=
34
Seth bought a pair of sneakers for $48 and a jacket for $64. About how much money did seth spend on the sneakers and the jacket?
Seth spent about $110 on the sneakers and jacket.
Ryan counted 63 birds in his backyard last week. This week he counted 71 birds in his backyard. Use compatible number to find out about how many birds Ryan counted.
65+70=135
Or about 135
Mr. Manuel has 56 Darwin Nunez jerseys. How many more does he need to get to 100 jerseys?
44!
Tyvon says that 555 rounded to the nearest hundred is 600.
Is he correct?
Yes, he is!
6,891-5,923
968