Find the following values without a calculator.
Give your answers in this manner. (Eg 1
35, 3
25, 4
23, 5
67)
- 9 - 811 = _____
- 245 - 110 = _____
- 723 - 129 = _____
- 2115 - 45 = _____
(a)
9 -
811 = 8
1111 -
811 = 8
311 (b)
Make the denominators the same.
2
45 -
110 = 2
4 x 25 x 2 -
110 = 2
810 -
110 = 2
710 (c)
Make the denominators the same.
7
23 - 1
29 = 7
2 x 33 x 3 - 1
29 = 7
69 - 1
29 = 6
49 (d)
Make the denominators the same.
2
115 -
45 = 2
115 -
4 x 35 x 3 = 1
1615 -
1215 = 1
415Answer(s): 8
311, 2
710, 6
49, 1
415