Rounding & Estimation
Round 5,753 to the nearest thousand.
6,000
Solve 3,000 – 2,450.
Subtract normally.
550 (3,000 − 2,450).
Solve: 7,236 + 5,957.
13,193 (7,236 + 5,957).
61,640 + 1,111 = 62,751
(True or False)
True (61,640 + 1,111 = 62,751).
Nikolas ran 1,362 miles last year. Round to the nearest hundred.
1,400 miles (1,362 rounded to the nearest hundred).
Round 2,256 to the nearest ten.
2260
Fill in the missing digits: 10,881 – 4,960 = _9_1.
Find the missing numbers.
missing digits are 5 and 2 (10,881 − 4,960 = 5,921).
Solve: 7,236 + 5,957 + 2,135.
15,328 (7,236 + 5,957 + 2,135).
62,561 – 17,638 = 80,199
(True/False)
False (62,561 − 17,638 = 44,923, not 80,199).
Jayson ran 1,948 miles last year. Round to the nearest hundred.
1,900 (1,948 rounded to the nearest hundred).
Round 3,160 to the nearest hundred.
3200
Solve: 9,601 – 939.
8,662 (9,601 − 939).
Fill in the blank: 23+56+72=56+__+72
23 (23 + 56 + 72 = 56 + 23 + 72: commutative property).
15,020 + 8,604 = 23,660
(True/False)
False (15,020 + 8,604 = 23,624, not 23,660).
Nikolas ran 1,362 miles and Jayson ran 1,948 miles last year.
How many total miles did Nikolas and Jayson run last year?
3,310 (1,362 + 1,948).
Round 1,247,546 to the nearest ten-thousand
1,250,000
Solve: 26,575 – 17,088.
9,487 (26,575 − 17,088)
Which equation shows the commutative property?
A) 3,010 + 2,370 + 1,505 = n
B) 3,010 + 1,505 + 2,370 = n
B (3,010 + 1,505 + 2,370 = n shows commutative reordering).
12,314 – 9,103 = 3,211
(True/False)
True (12,314 − 9,103 = 3,211).
This year Nikolas ran 1982 miles and Jayson ran 1013 miles.
How many total miles did Nikolas and Jayson run this year?
2,995 (1,982 + 1,013).
Estimate and find the sum.
5,753
2,250
3,160
(Round to the nearest thousand)
(6,000 + 2,000 + 3,000)
11,000
Estimate and subtract:
3,498-2,987=
Estimate ≈ 500; Exact = 511 (3,498 − 2,987).
Which equation shows the associative property of addition?
A) 3,010 + 1,505 + 2,370 = n
B) (2,370 + 3,010) + 1,505 = n
C) 3,000 + 2,300 + 1,500 = n
D) 3,010 + 1,505 = n
B (2,370+3,010)+1,505=n(2,370 + 3,010) + 1,505 = n(2,370+3,010)+1,505=n (associative property).
22,222 – 11,111 = 11,111
(True/False)
True (22,222 − 11,111 = 11,111).
Nikolas ran 1,362 miles last year and 1,982 miles this year.
Jayson ran 1,948 miles last year and 1,013 miles this year.
👉 How many more miles did they run last year compared to this year?
315 more miles last year (3,310 − 2,995).