Find the following values without a calculator.
Give your answers in this manner. (Eg 1
35, 3
25, 4
23, 5
67)
- 5 - 211 = _____
- 239 - 118 = _____
- 625 - 1310 = _____
- 7115 - 45 = _____
(a)
5 -
211 = 4
1111 -
211 = 4
911 (b)
Make the denominators the same.
2
39 -
118 = 2
3 x 29 x 2 -
118 = 2
618 -
118 = 2
518 (c)
Make the denominators the same.
6
25 - 1
310 = 6
2 x 25 x 2 - 1
310 = 6
410 - 1
310 = 5
110 (d)
Make the denominators the same.
7
115 -
45 = 7
115 -
4 x 35 x 3 = 6
1615 -
1215 = 6
415Answer(s): 4
911, 2
518, 5
110, 6
415