Common Denominators
What is the least common denominator for 2 and 4?
4
4 1/2+ 3 1/4
(four and one half plus 3 and one fourth)
7 3/4
7 3/4- 2 1/2
(seven and three fourths minus 2 and one half)
5 1/4
Which numbers would round to 1.25 when rounded to the nearest hundredth? Choose all correct answers
1.255
1.252
1.242
1.248
1.245
1.252
1.248
1.245
Addition or Subtraction?
Janet buys 1 1/4 yards of cloth. She uses 3/8 yard for a craft project. How much cloth, in yards, does Janet have left?
Subtract
What is the least common denominator for 4 and 3?
12
2 3/4+ 1 7/8
(two and three fourths plus one and seven eighths)
4 5/8
1 1/5- 1/4
(one and one fifth minus one fourth)
19/20
Compare:
0.07___ 0.070
0.07=0.070
Add or subtract?
Jake has three pieces of ribbon. The lengths of the ribbons are 136.7 cm, 136.85 cm, and 104.9 cm. What is the difference in length between the longest and shortest pieces of ribbon?
Subtract
What is the least common denominator for 8 and 4?
8
3 5/8+4 1/2
(three and five eighths plus four and one half)
8 1/8
2/3-1/5
(two thirds minus one fifth)
7/15
0.05 x ___= 5
Write the missing power of 10
102
Laurie was making punch. She used 2 1/3 cup of orange juice and 6 3/4 cups of apple juice. She also used 8 1/6 cups of seltzer. How much juice did she use?
Addition
What is the least common denominator for 5 and 4?
20
2 1/4+ 1 2/3
(two and one fourth plus one and two thirds)
3 11/12
2 3/4-1 7/8
(two and three fourths minus one and seven eighths)
7/8
Write in standard form:
4 x 1,000 + 9 x 100 + 2 x 1/10 + 5 x 1/1,000
4,900.205
Laurie was making punch. She used 2 1/3 cup of orange juice and 6 3/4 cups of apple juice. She also used 8 1/6 cups of seltzer. How much more juice than seltzer did she use?
Subtraction
What is the least common denominator for 6 and 4?
12
Mary Lou has 5 1/4 Yards of purple fabric. She has 3 7/8 yards of blue fabric. How many yards of fabric does Mary Lou have in all?
9 1/8
Keith travels to school by walking 1 2/10 miles to the bus stop, then he takes the bus for 3 4/5 miles. How much longer is his bus ride than his walk?
2 6/10 OR 2 3/5
Marcos has $8.00. He earns $11.50 for mowing the lawn. Then he spends $6.99 for a notebook. How much money, in dollars, does Marcos have left?
$12.51
The penguin nursery is open two times a day: 2/3 of an hour at noon and 5 1/2 hours in the afternoon. How much time is the penguin nursery open every day?
Addition