Find the following values without a calculator.
Give your answers in this manner. (Eg
12,
23,
34,
45)
- 4 - 18 = _____
- 4410 - 130 = _____
- 815 - 1320 = _____
- 2110 - 45 = _____
(a)
4 -
18 = 3
88 -
18 = 3
78 (b)
Make the denominators the same.
4
410 -
130 = 4
4 x 310 x 3 -
130 = 4
1230 -
130 = 4
1130 (c)
Make the denominators the same.
8
15 - 1
320 = 8
1 x 45 x 4 - 1
320 = 8
420 - 1
320 = 7
120 (d)
Make the denominators the same.
2
110 -
45 = 2
110 -
4 x 25 x 2 = 1
1110 -
810 = 1
310Answer(s): 3
78, 4
1130, 7
120, 1
310