Find the following values without a calculator.
Give your answers in this manner. (Eg
12,
23,
34,
45)
- 5 - 512 = _____
- 437 - 121 = _____
- 313 - 229 = _____
- 7121 - 47 = _____
(a)
5 -
512 = 4
1212 -
512 = 4
712 (b)
Make the denominators the same.
4
37 -
121 = 4
3 x 37 x 3 -
121 = 4
921 -
121 = 4
821 (c)
Make the denominators the same.
3
13 - 2
29 = 3
1 x 33 x 3 - 2
29 = 3
39 - 2
29 = 1
19 (d)
Make the denominators the same.
7
121 -
47 = 7
121 -
4 x 37 x 3 = 6
2221 -
1221 = 6
1021Answer(s): 4
712, 4
821, 1
19, 6
1021