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

(a) 77 x 8 + 2 x 77 = _____ x 77
(b) 19 x 5 + 5 x 6 + 5 x 5 = _____ x 5 + 2 x 5
(c) 155 x 18 - 2 x 155 = _____ x 155
(d) 15 x 7 + 7 x 7 - 9 x 7 = 16 x 7 - 7 x _____
(a)
77 x 8 + 2 x 77 = _____ x 77
8 x 77 + 2 x 77 = _____ x 77
(8 + 2) x 77 = _____ x 77

10 x 77 =  _____ x 77

(b)
19 x 5 + 5 x 6 + 5 x 5 = _____ x 5 + 2 x 5
(19 + 6 + 5) x 5 = = _____ x 5 + 2 x 5
30 x 5 = _____ x 5 + 2 x 5
30 x 5 - 2 x 5 = _____ x 5
(30 - 2) x 5 = _____ x 5

28 x 5 = _____ x 5

(c)
155 x 18 - 2 x 155 = _____ x 155
(18 - 2) x 155 = _____ x 155

16 x 155 = _____ x 155

(d)
15 x 7 + 7 x 7 - 9 x 7 = 16 x 7 - 7 x _____
(15 + 7 - 9) x 7 = 16 x 7 - _____ x 7
13 x 7 = 16 x 7 - _____ x 7
16 x 7 - 13 x 7 = _____ x 7
(16 - 13) x 7 = _____ x 7

3 x 7 = _____ x 7

Answer(s): 10, 28, 16, 3