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

(a) 49 x 6 + 4 x 49 = _____ x 49
(b) 16 x 5 + 5 x 7 + 5 x 4 = _____ x 5 + 10 x 5
(c) 140 x 17 - 4 x 140 = _____ x 140
(d) 11 x 8 + 5 x 8 - 7 x 8 = 20 x 8 - 8 x _____
(a)
49 x 6 + 4 x 49 = _____ x 49
6 x 49 + 4 x 49 = _____ x 49
(6 + 4) x 49 = _____ x 49

10 x 49 =  _____ x 49

(b)
16 x 5 + 5 x 7 + 5 x 4 = _____ x 5 + 10 x 5
(16 + 7 + 4) x 5 = = _____ x 5 + 10 x 5
27 x 5 = _____ x 5 + 10 x 5
27 x 5 - 10 x 5 = _____ x 5
(27 - 10) x 5 = _____ x 5

17 x 5 = _____ x 5

(c)
140 x 17 - 4 x 140 = _____ x 140
(17 - 4) x 140 = _____ x 140

13 x 140 = _____ x 140

(d)
11 x 8 + 5 x 8 - 7 x 8 = 20 x 8 - 8 x _____
(11 + 5 - 7) x 8 = 20 x 8 - _____ x 8
9 x 8 = 20 x 8 - _____ x 8
20 x 8 - 9 x 8 = _____ x 8
(20 - 9) x 8 = _____ x 8

11 x 8 = _____ x 8

Answer(s): 10, 17, 13, 11