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

(a) 88 x 2 + 7 x 88 = _____ x 88
(b) 16 x 4 + 4 x 2 + 4 x 3 = _____ x 4 + 8 x 4
(c) 280 x 19 - 4 x 280 = _____ x 280
(d) 11 x 9 + 1 x 9 - 9 x 9 = 16 x 9 - 9 x _____
(a)
88 x 2 + 7 x 88 = _____ x 88
2 x 88 + 7 x 88 = _____ x 88
(2 + 7) x 88 = _____ x 88

9 x 88 =  _____ x 88

(b)
16 x 4 + 4 x 2 + 4 x 3 = _____ x 4 + 8 x 4
(16 + 2 + 3) x 4 = = _____ x 4 + 8 x 4
21 x 4 = _____ x 4 + 8 x 4
21 x 4 - 8 x 4 = _____ x 4
(21 - 8) x 4 = _____ x 4

13 x 4 = _____ x 4

(c)
280 x 19 - 4 x 280 = _____ x 280
(19 - 4) x 280 = _____ x 280

15 x 280 = _____ x 280

(d)
11 x 9 + 1 x 9 - 9 x 9 = 16 x 9 - 9 x _____
(11 + 1 - 9) x 9 = 16 x 9 - _____ x 9
3 x 9 = 16 x 9 - _____ x 9
16 x 9 - 3 x 9 = _____ x 9
(16 - 3) x 9 = _____ x 9

13 x 9 = _____ x 9

Answer(s): 9, 13, 15, 13