Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 23 = ?21
- 17 = 5?
- 12 = 510 = ?50
- 12 = 24 = 9?
(a)
23 =
2 x 73 x 7 =
1421 (b)
17 =
1 x 57 x 5 =
535 (c)
12 =
510 =
5 x 510 x 5 =
2550 (d)
12 =
24 =
1 x 92 x 9 =
918Answer(s): 14, 35, 25, 18