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

(a) 87 x 5 + 2 x 87 = _____ x 87
(b) 17 x 3 + 3 x 6 + 3 x 3 = _____ x 3 + 7 x 3
(c) 128 x 13 - 5 x 128 = _____ x 128
(d) 17 x 6 + 2 x 6 - 8 x 6 = 15 x 6 - 6 x _____
(a)
87 x 5 + 2 x 87 = _____ x 87
5 x 87 + 2 x 87 = _____ x 87
(5 + 2) x 87 = _____ x 87

7 x 87 =  _____ x 87

(b)
17 x 3 + 3 x 6 + 3 x 3 = _____ x 3 + 7 x 3
(17 + 6 + 3) x 3 = = _____ x 3 + 7 x 3
26 x 3 = _____ x 3 + 7 x 3
26 x 3 - 7 x 3 = _____ x 3
(26 - 7) x 3 = _____ x 3

19 x 3 = _____ x 3

(c)
128 x 13 - 5 x 128 = _____ x 128
(13 - 5) x 128 = _____ x 128

8 x 128 = _____ x 128

(d)
17 x 6 + 2 x 6 - 8 x 6 = 15 x 6 - 6 x _____
(17 + 2 - 8) x 6 = 15 x 6 - _____ x 6
11 x 6 = 15 x 6 - _____ x 6
15 x 6 - 11 x 6 = _____ x 6
(15 - 11) x 6 = _____ x 6

4 x 6 = _____ x 6

Answer(s): 7, 19, 8, 4