Rounding
Round 267 to the nearest 100 place
300
Front-end estimate the sum of 147 and 781
800
Is 12 a multiple of 3?
Yes, 12 can be divided exactly by 3.
Is 6 a factor of 5?
No
Round 1,023 to the nearest thousand place
1,000
Use Front-end estimation to find the difference of 8,412 and 1,951.
8,000-1,00 = 7,00
List of first 5 multiple of 7.
7, 14, 21, 28, 35
Find the factors of 24
1, 2, 3, 4, 6, 8, 12, 24
Round 2,453 to the nearest tens place
2,450
Use front-end estimation to find the product of 267 x 7
200 x 7 = 1,400
What is the LCM of 3 and 4?
12
Is 8 a factor of 56?
Yes 8 x 7
Round 23,463 to the nearest 10,000 place
20,000
Santos bought 2 cartons of single cup coffee pods, each containing 326 coffee pods. Find the total number of coffee pods in the cartons. Use estimation to check that your answer is reasonable.
326 x 2 = 652
Check: 300 x 2 = 600
What is the least common multiple of 5 and 3?
15
List the factors of 32
1, 2, 4, 8, 16, 32
Round 99,999 to the nearest 10,000 place
100,000
4 people are invited to Marcia's home. Each guest gets one carton of cranberry juice, which costs 45 cents. About how much money does Marcia need to buy the juice?
50 x 4 = 2.00
What do these numbers have in common?
40, 25, 50, 65, 30
5 is a common multiple of all the numbers above.
Which number has more factors 20 or 24?
20 = 1, 2, 4, 5, 10 and 20
24 = 1, 2, 3, 4, 6, 8, 12 and 24