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

(a) 28 x 7 + 9 x 28 = _____ x 28
(b) 10 x 9 + 9 x 6 + 9 x 2 = _____ x 9 + 5 x 9
(c) 270 x 15 - 8 x 270 = _____ x 270
(d) 14 x 4 + 2 x 4 - 7 x 4 = 14 x 4 - 4 x _____
(a)
28 x 7 + 9 x 28 = _____ x 28
7 x 28 + 9 x 28 = _____ x 28
(7 + 9) x 28 = _____ x 28

16 x 28 =  _____ x 28

(b)
10 x 9 + 9 x 6 + 9 x 2 = _____ x 9 + 5 x 9
(10 + 6 + 2) x 9 = = _____ x 9 + 5 x 9
18 x 9 = _____ x 9 + 5 x 9
18 x 9 - 5 x 9 = _____ x 9
(18 - 5) x 9 = _____ x 9

13 x 9 = _____ x 9

(c)
270 x 15 - 8 x 270 = _____ x 270
(15 - 8) x 270 = _____ x 270

7 x 270 = _____ x 270

(d)
14 x 4 + 2 x 4 - 7 x 4 = 14 x 4 - 4 x _____
(14 + 2 - 7) x 4 = 14 x 4 - _____ x 4
9 x 4 = 14 x 4 - _____ x 4
14 x 4 - 9 x 4 = _____ x 4
(14 - 9) x 4 = _____ x 4

5 x 4 = _____ x 4

Answer(s): 16, 13, 7, 5