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

(a) 77 x 9 + 6 x 77 = _____ x 77
(b) 11 x 8 + 8 x 9 + 8 x 4 = _____ x 8 + 7 x 8
(c) 131 x 12 - 9 x 131 = _____ x 131
(d) 10 x 3 + 8 x 3 - 6 x 3 = 14 x 3 - 3 x _____
(a)
77 x 9 + 6 x 77 = _____ x 77
9 x 77 + 6 x 77 = _____ x 77
(9 + 6) x 77 = _____ x 77

15 x 77 =  _____ x 77

(b)
11 x 8 + 8 x 9 + 8 x 4 = _____ x 8 + 7 x 8
(11 + 9 + 4) x 8 = = _____ x 8 + 7 x 8
24 x 8 = _____ x 8 + 7 x 8
24 x 8 - 7 x 8 = _____ x 8
(24 - 7) x 8 = _____ x 8

17 x 8 = _____ x 8

(c)
131 x 12 - 9 x 131 = _____ x 131
(12 - 9) x 131 = _____ x 131

3 x 131 = _____ x 131

(d)
10 x 3 + 8 x 3 - 6 x 3 = 14 x 3 - 3 x _____
(10 + 8 - 6) x 3 = 14 x 3 - _____ x 3
12 x 3 = 14 x 3 - _____ x 3
14 x 3 - 12 x 3 = _____ x 3
(14 - 12) x 3 = _____ x 3

2 x 3 = _____ x 3

Answer(s): 15, 17, 3, 2