Find the following values without a calculator.
Give your answers in this manner. (Eg 1
35, 3
25, 4
23, 5
67)
- 8 - 12 = _____
- 5310 - 140 = _____
- 413 - 3312 = _____
- 3121 - 47 = _____
(a)
8 -
12 = 7
22 -
12 = 7
12 (b)
Make the denominators the same.
5
310 -
140 = 5
3 x 410 x 4 -
140 = 5
1240 -
140 = 5
1140 (c)
Make the denominators the same.
4
13 - 3
312 = 4
1 x 43 x 4 - 3
312 = 4
412 - 3
312 = 1
112 (d)
Make the denominators the same.
3
121 -
47 = 3
121 -
4 x 37 x 3 = 2
2221 -
1221 = 2
1021Answer(s): 7
12, 5
1140, 1
112, 2
1021