Find the following values without a calculator.
Give your answers in this manner. (Eg
12,
23,
34,
45)
- 3 - 79 = _____
- 235 - 115 = _____
- 734 - 118 = _____
- 4221 - 57 = _____
(a)
3 -
79 = 2
99 -
79 = 2
29 (b)
Make the denominators the same.
2
35 -
115 = 2
3 x 35 x 3 -
115 = 2
915 -
115 = 2
815 (c)
Make the denominators the same.
7
34 - 1
18 = 7
3 x 24 x 2 - 1
18 = 7
68 - 1
18 = 6
58 (d)
Make the denominators the same.
4
221 -
57 = 4
221 -
5 x 37 x 3 = 3
2321 -
1521 = 3
821Answer(s): 2
29, 2
815, 6
58, 3
821