Find the following values without a calculator.
Give your answers in this manner. (Eg
12,
23,
34,
45)
- 6 - 17 = _____
- 547 - 121 = _____
- 934 - 538 = _____
- 2221 - 57 = _____
(a)
6 -
17 = 5
77 -
17 = 5
67 (b)
Make the denominators the same.
5
47 -
121 = 5
4 x 37 x 3 -
121 = 5
1221 -
121 = 5
1121 (c)
Make the denominators the same.
9
34 - 5
38 = 9
3 x 24 x 2 - 5
38 = 9
68 - 5
38 = 4
38 (d)
Make the denominators the same.
2
221 -
57 = 2
221 -
5 x 37 x 3 = 1
2321 -
1521 = 1
821Answer(s): 5
67, 5
1121, 4
38, 1
821