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

(a) 12 x 9 + 6 x 12 = _____ x 12
(b) 18 x 4 + 4 x 4 + 4 x 5 = _____ x 4 + 7 x 4
(c) 155 x 10 - 3 x 155 = _____ x 155
(d) 17 x 3 + 3 x 3 - 3 x 3 = 20 x 3 - 3 x _____
(a)
12 x 9 + 6 x 12 = _____ x 12
9 x 12 + 6 x 12 = _____ x 12
(9 + 6) x 12 = _____ x 12

15 x 12 =  _____ x 12

(b)
18 x 4 + 4 x 4 + 4 x 5 = _____ x 4 + 7 x 4
(18 + 4 + 5) x 4 = = _____ x 4 + 7 x 4
27 x 4 = _____ x 4 + 7 x 4
27 x 4 - 7 x 4 = _____ x 4
(27 - 7) x 4 = _____ x 4

20 x 4 = _____ x 4

(c)
155 x 10 - 3 x 155 = _____ x 155
(10 - 3) x 155 = _____ x 155

7 x 155 = _____ x 155

(d)
17 x 3 + 3 x 3 - 3 x 3 = 20 x 3 - 3 x _____
(17 + 3 - 3) x 3 = 20 x 3 - _____ x 3
17 x 3 = 20 x 3 - _____ x 3
20 x 3 - 17 x 3 = _____ x 3
(20 - 17) x 3 = _____ x 3

3 x 3 = _____ x 3

Answer(s): 15, 20, 7, 3