Find the following values without a calculator.
Give your answers in this manner. (Eg 1
35, 3
25, 4
23, 5
67)
- 9 - 712 = _____
- 346 - 118 = _____
- 925 - 2310 = _____
- 8121 - 67 = _____
(a)
9 -
712 = 8
1212 -
712 = 8
512 (b)
Make the denominators the same.
3
46 -
118 = 3
4 x 36 x 3 -
118 = 3
1218 -
118 = 3
1118 (c)
Make the denominators the same.
9
25 - 2
310 = 9
2 x 25 x 2 - 2
310 = 9
410 - 2
310 = 7
110 (d)
Make the denominators the same.
8
121 -
67 = 8
121 -
6 x 37 x 3 = 7
2221 -
1821 = 7
421Answer(s): 8
512, 3
1118, 7
110, 7
421