Find the following values without a calculator.
Give your answers in this manner. (Eg
12,
23,
34,
45)
- 9 - 511 = _____
- 2210 - 120 = _____
- 925 - 3120 = _____
- 6114 - 67 = _____
(a)
9 -
511 = 8
1111 -
511 = 8
611 (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.
9
25 - 3
120 = 9
2 x 45 x 4 - 3
120 = 9
820 - 3
120 = 6
720 (d)
Make the denominators the same.
6
114 -
67 = 6
114 -
6 x 27 x 2 = 5
1514 -
1214 = 5
314Answer(s): 8
611, 2
320, 6
720, 5
314