Find the following values without a calculator.
Give your answers in this manner. (Eg 1
35, 3
25, 4
23, 5
67)
- 9 - 29 = _____
- 2210 - 120 = _____
- 534 - 318 = _____
- 4116 - 78 = _____
(a)
9 -
29 = 8
99 -
29 = 8
79 (b)
Make the denominators the same.
2
210 -
120 = 2
2 x 210 x 2 -
120 = 2
420 -
120 = 2
320 (c)
Make the denominators the same.
5
34 - 3
18 = 5
3 x 24 x 2 - 3
18 = 5
68 - 3
18 = 2
58 (d)
Make the denominators the same.
4
116 -
78 = 4
116 -
7 x 28 x 2 = 3
1716 -
1416 = 3
316Answer(s): 8
79, 2
320, 2
58, 3
316