Subtracting Fractions
5/12 - 4/12
1/12
What is 792 550 in expanded form?
700 000 + 90 000 + 2000 + 500 + 50
Order these integer from least to greatest: -6, -21, 8, -9, 6 and 17
-21, -9, -6, 6, 8, 17
Order these integers from greatest to least: 15, 2, -9, 12, -13, 25
25, 15, 12, 2, -9, -13
5/12 + 3/12
8/12 = 2/3
5/9 - 3/6
2/36 = 1/18
Show 637 000 in scientific notation.
6.37 x 105
(-7) - (+9)
-16
(+13) + (-6)
7
5/12 + 4/9
31/36
3 9/10 - 1 3/5
2 3/10
Show 5.83 x 10-5
0.0000583
(-15) - (-19)
+4
(-18) + (29)
11
2 2/5 + 1 1/5
3 3/5
After subtracting two fractions, Jimmy said his answer of 4/10 was greater. However, Harold said his answer of 2/8 was greater. Who is correct?
4/10 = 16/40
2/8 = 10/40
Therefore, Jimmy is correct. 4/10 is greater than 2/8.
Show 2.945 x 104 in expanded form.
29 450
20 000 + 9000 + 400 + 50
(+21) - (-10) - (+5)
+26
(-25) + (12) + (-13)
-26
Add and write the sum in simplest form: 5/6 + 11/4
5/6 = 10/12
11/4 = 33/12
10/12 + 33/12 = 43/12 = 3 7/12
There is a bin of 14 different mittens. 2 of them are yellow, 5 are green and 1 is pink. The rest are blue. What fraction of the mittens are blue?
14/14 - (5/14 + 2/14 _ 1/14)
14/14 - 8/14
6/14 = 3/7
Therefore 3/7 of the mittens are blue.
Add: 29 x 104 + 179 x 103 + 908 + 102. Write the sum in scientific notation.
290 000 + 179 000 + 90 800 = 559 800
5.598 x 105
Lukacs has $13. He owes the bank $25. On the way to the bank he finds $20. He then stops for lunch, which was $15. Does he have enough money to pay the bank? How much does he need in order to be able to pay the bank?
(13) - (+25) = -12
(-12) + (20) = 8
(8) - (15) = -7
No, he doesn't. He would still need $7 to get out of his debt. Plus additional $25 to be able to pay the bank. Meaning he would need $32.
Ben had made $147 over the summer. He then bought a new skateboard for $74. When he got home he got his $5 dollar allowance, but his big sister reminded him that he owed her $25 for pizza. How much does he have left?
(147) - (74) = 73
(73) + (5) = 78
(78) - (25) = 53
Ben is left with 53 dollars.
Charlie has some coins in his wallet. One quarter of the coins are nickels, one third are dimes, and one sixth are quarters. The rest are pennies. What fraction of the coins are pennies?
1/4 + 1/3 + 1/6
4/24 + 6/24 + 8/24 = 18/24
24/24 - 18/24 = 6/24 = 1/4
1/4 are pennies.