Find the following values without a calculator.
Give your answers in this manner. (Eg
12,
23,
34,
45)
- 8 - 411 = _____
- 4210 - 120 = _____
- 913 - 4312 = _____
- 6221 - 57 = _____
(a)
8 -
411 = 7
1111 -
411 = 7
711 (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.
9
13 - 4
312 = 9
1 x 43 x 4 - 4
312 = 9
412 - 4
312 = 5
112 (d)
Make the denominators the same.
6
221 -
57 = 6
221 -
5 x 37 x 3 = 5
2321 -
1521 = 5
821Answer(s): 7
711, 4
320, 5
112, 5
821