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

(a) 82 x 7 + 7 x 82 = _____ x 82
(b) 18 x 3 + 3 x 7 + 3 x 5 = _____ x 3 + 7 x 3
(c) 248 x 20 - 6 x 248 = _____ x 248
(d) 17 x 10 + 7 x 10 - 7 x 10 = 19 x 10 - 10 x _____
(a)
82 x 7 + 7 x 82 = _____ x 82
7 x 82 + 7 x 82 = _____ x 82
(7 + 7) x 82 = _____ x 82

14 x 82 =  _____ x 82

(b)
18 x 3 + 3 x 7 + 3 x 5 = _____ x 3 + 7 x 3
(18 + 7 + 5) x 3 = = _____ x 3 + 7 x 3
30 x 3 = _____ x 3 + 7 x 3
30 x 3 - 7 x 3 = _____ x 3
(30 - 7) x 3 = _____ x 3

23 x 3 = _____ x 3

(c)
248 x 20 - 6 x 248 = _____ x 248
(20 - 6) x 248 = _____ x 248

14 x 248 = _____ x 248

(d)
17 x 10 + 7 x 10 - 7 x 10 = 19 x 10 - 10 x _____
(17 + 7 - 7) x 10 = 19 x 10 - _____ x 10
17 x 10 = 19 x 10 - _____ x 10
19 x 10 - 17 x 10 = _____ x 10
(19 - 17) x 10 = _____ x 10

2 x 10 = _____ x 10

Answer(s): 14, 23, 14, 2