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

(a) 98 x 9 + 8 x 98 = _____ x 98
(b) 15 x 6 + 6 x 5 + 6 x 2 = _____ x 6 + 2 x 6
(c) 144 x 12 - 4 x 144 = _____ x 144
(d) 10 x 3 + 9 x 3 - 5 x 3 = 16 x 3 - 3 x _____
(a)
98 x 9 + 8 x 98 = _____ x 98
9 x 98 + 8 x 98 = _____ x 98
(9 + 8) x 98 = _____ x 98

17 x 98 =  _____ x 98

(b)
15 x 6 + 6 x 5 + 6 x 2 = _____ x 6 + 2 x 6
(15 + 5 + 2) x 6 = = _____ x 6 + 2 x 6
22 x 6 = _____ x 6 + 2 x 6
22 x 6 - 2 x 6 = _____ x 6
(22 - 2) x 6 = _____ x 6

20 x 6 = _____ x 6

(c)
144 x 12 - 4 x 144 = _____ x 144
(12 - 4) x 144 = _____ x 144

8 x 144 = _____ x 144

(d)
10 x 3 + 9 x 3 - 5 x 3 = 16 x 3 - 3 x _____
(10 + 9 - 5) x 3 = 16 x 3 - _____ x 3
14 x 3 = 16 x 3 - _____ x 3
16 x 3 - 14 x 3 = _____ x 3
(16 - 14) x 3 = _____ x 3

2 x 3 = _____ x 3

Answer(s): 17, 20, 8, 2