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

(a) 57 x 8 + 5 x 57 = _____ x 57
(b) 19 x 4 + 4 x 3 + 4 x 4 = _____ x 4 + 7 x 4
(c) 243 x 11 - 9 x 243 = _____ x 243
(d) 11 x 3 + 7 x 3 - 7 x 3 = 19 x 3 - 3 x _____
(a)
57 x 8 + 5 x 57 = _____ x 57
8 x 57 + 5 x 57 = _____ x 57
(8 + 5) x 57 = _____ x 57

13 x 57 =  _____ x 57

(b)
19 x 4 + 4 x 3 + 4 x 4 = _____ x 4 + 7 x 4
(19 + 3 + 4) x 4 = = _____ x 4 + 7 x 4
26 x 4 = _____ x 4 + 7 x 4
26 x 4 - 7 x 4 = _____ x 4
(26 - 7) x 4 = _____ x 4

19 x 4 = _____ x 4

(c)
243 x 11 - 9 x 243 = _____ x 243
(11 - 9) x 243 = _____ x 243

2 x 243 = _____ x 243

(d)
11 x 3 + 7 x 3 - 7 x 3 = 19 x 3 - 3 x _____
(11 + 7 - 7) x 3 = 19 x 3 - _____ x 3
11 x 3 = 19 x 3 - _____ x 3
19 x 3 - 11 x 3 = _____ x 3
(19 - 11) x 3 = _____ x 3

8 x 3 = _____ x 3

Answer(s): 13, 19, 2, 8