Find the following values without a calculator.
Give your answers in this manner. (Eg 1
35, 3
25, 4
23, 5
67)
- 7 - 37 = _____
- 3210 - 120 = _____
- 914 - 518 = _____
- 5110 - 45 = _____
(a)
7 -
37 = 6
77 -
37 = 6
47 (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.
9
14 - 5
18 = 9
1 x 24 x 2 - 5
18 = 9
28 - 5
18 = 4
18 (d)
Make the denominators the same.
5
110 -
45 = 5
110 -
4 x 25 x 2 = 4
1110 -
810 = 4
310Answer(s): 6
47, 3
320, 4
18, 4
310