Find the following values without a calculator.
Give your answers in this manner. (Eg
12,
23,
34,
45)
- 3 - 19 = _____
- 3210 - 120 = _____
- 512 - 418 = _____
- 6221 - 57 = _____
(a)
3 -
19 = 2
99 -
19 = 2
89 (b)
Make the denominators the same.
3
210 -
120 = 3
2 x 210 x 2 -
120 = 3
420 -
120 = 3
320 (c)
Make the denominators the same.
5
12 - 4
18 = 5
1 x 42 x 4 - 4
18 = 5
48 - 4
18 = 1
38 (d)
Make the denominators the same.
6
221 -
57 = 6
221 -
5 x 37 x 3 = 5
2321 -
1521 = 5
821Answer(s): 2
89, 3
320, 1
38, 5
821