Find the following values without a calculator.
Give your answers in this manner. (Eg 1
35, 3
25, 4
23, 5
67)
- 4 - 711 = _____
- 239 - 118 = _____
- 723 - 229 = _____
- 8221 - 57 = _____
(a)
4 -
711 = 3
1111 -
711 = 3
411 (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.
7
23 - 2
29 = 7
2 x 33 x 3 - 2
29 = 7
69 - 2
29 = 5
49 (d)
Make the denominators the same.
8
221 -
57 = 8
221 -
5 x 37 x 3 = 7
2321 -
1521 = 7
821Answer(s): 3
411, 2
518, 5
49, 7
821