Find the following values without a calculator.
Give your answers in this manner. (Eg
12,
23,
34,
45)
- 8 - 712 = _____
- 4210 - 120 = _____
- 824 - 5116 = _____
- 6316 - 78 = _____
(a)
8 -
712 = 7
1212 -
712 = 7
512 (b)
Make the denominators the same.
4
210 -
120 = 4
2 x 210 x 2 -
120 = 4
420 -
120 = 4
320 (c)
Make the denominators the same.
8
24 - 5
116 = 8
2 x 44 x 4 - 5
116 = 8
816 - 5
116 = 3
716 (d)
Make the denominators the same.
6
316 -
78 = 6
316 -
7 x 28 x 2 = 5
1916 -
1416 = 5
516Answer(s): 7
512, 4
320, 3
716, 5
516