Find the following values without a calculator.
Give your answers in this manner. (Eg
12,
23,
34,
45)
- 6 - 17 = _____
- 5210 - 120 = _____
- 914 - 4316 = _____
- 7116 - 78 = _____
(a)
6 -
17 = 5
77 -
17 = 5
67 (b)
Make the denominators the same.
5
210 -
120 = 5
2 x 210 x 2 -
120 = 5
420 -
120 = 5
320 (c)
Make the denominators the same.
9
14 - 4
316 = 9
1 x 44 x 4 - 4
316 = 9
416 - 4
316 = 5
116 (d)
Make the denominators the same.
7
116 -
78 = 7
116 -
7 x 28 x 2 = 6
1716 -
1416 = 6
316Answer(s): 5
67, 5
320, 5
116, 6
316