Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)

(a) 83 x 5 + 2 x 83 = _____ x 83
(b) 13 x 9 + 9 x 10 + 9 x 3 = _____ x 9 + 4 x 9
(c) 252 x 17 - 1 x 252 = _____ x 252
(d) 10 x 8 + 7 x 8 - 5 x 8 = 15 x 8 - 8 x _____
(a)
83 x 5 + 2 x 83 = _____ x 83
5 x 83 + 2 x 83 = _____ x 83
(5 + 2) x 83 = _____ x 83

7 x 83 =  _____ x 83

(b)
13 x 9 + 9 x 10 + 9 x 3 = _____ x 9 + 4 x 9
(13 + 10 + 3) x 9 = = _____ x 9 + 4 x 9
26 x 9 = _____ x 9 + 4 x 9
26 x 9 - 4 x 9 = _____ x 9
(26 - 4) x 9 = _____ x 9

22 x 9 = _____ x 9

(c)
252 x 17 - 1 x 252 = _____ x 252
(17 - 1) x 252 = _____ x 252

16 x 252 = _____ x 252

(d)
10 x 8 + 7 x 8 - 5 x 8 = 15 x 8 - 8 x _____
(10 + 7 - 5) x 8 = 15 x 8 - _____ x 8
12 x 8 = 15 x 8 - _____ x 8
15 x 8 - 12 x 8 = _____ x 8
(15 - 12) x 8 = _____ x 8

3 x 8 = _____ x 8

Answer(s): 7, 22, 16, 3