Rounding/Estimating to Add Whole Numbers
Round to the nearest thousand.
284,298 + 48,560
333,000
Round to the nearest thousand.
85,701 - 33,247
53,000
413 x 12
4956
240/80
3
A bin of potatoes weighs 100 kg. The potatoes are packed into bags weighing 15 kg each. How many bags are there? How many bags are left?
There are 6 bags of potatoes. There are 10 kg of potatoes left.
Round to the nearest thousand.
153,497 + 687,198 + 28,253
869,000
Round to the nearest thousand.
779,488 - 113,834
665,000
2000 x 70
140,000
4000/50
80
A community group is replanting trees. They buy 49 bundles of tree seedlings that each have 75 seedlings. They divide the seedlings into small bundles of 15 each. How many small bundles are there?
245 small bundles
Use front-end estimation
268,541 + 254,387
523,000
Use front-end estimation.
275,016 - 22,770
252,000
1256 x 60
56,520
802/92
8 R 66
The team makes $2470 if they sell 19 books of tickets.
Use front-end estimation.
84,261 + 207,879 + 106,175
398,000
Use front-end estimation.
999,550 - 881,697
118,000
4059 x 58
235,422
153/27
5 R 18
There are 912 yellow chairs and blue chairs altogether in an auditorium. The blue chairs are arranged in 36 rows with 12 chairs in each row. The yellow chairs are arranged in rows of 20. How many rows of yellow chairs are there?
24 rows of yellow chairs
Use front-end estimation.
42,619 + 17,391 + 24,738
85,000
Use front-end estimation.
866,392 - 452,931
413,000
5286 x 62
327,732
963/27
35 R 18
Elena bought 49 packs of red balloons, 66 packs of blue balloons, and 35 packs of yellow balloons. Each pack contained 12 balloons. She mixed them up and gave away 225 balloons. She then repacked the balance into large packs of 25.
How many large packs of 25 balloons were there?
Elena paid $9 for each pack of a dozen balloons. She sold each new pack of 25 balloons for $24. How much money did she make?
63 large packs
She made $162