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

(a) 34 x 5 + 4 x 34 = _____ x 34
(b) 13 x 5 + 5 x 8 + 5 x 4 = _____ x 5 + 4 x 5
(c) 257 x 20 - 8 x 257 = _____ x 257
(d) 13 x 10 + 3 x 10 - 2 x 10 = 17 x 10 - 10 x _____
(a)
34 x 5 + 4 x 34 = _____ x 34
5 x 34 + 4 x 34 = _____ x 34
(5 + 4) x 34 = _____ x 34

9 x 34 =  _____ x 34

(b)
13 x 5 + 5 x 8 + 5 x 4 = _____ x 5 + 4 x 5
(13 + 8 + 4) x 5 = = _____ x 5 + 4 x 5
25 x 5 = _____ x 5 + 4 x 5
25 x 5 - 4 x 5 = _____ x 5
(25 - 4) x 5 = _____ x 5

21 x 5 = _____ x 5

(c)
257 x 20 - 8 x 257 = _____ x 257
(20 - 8) x 257 = _____ x 257

12 x 257 = _____ x 257

(d)
13 x 10 + 3 x 10 - 2 x 10 = 17 x 10 - 10 x _____
(13 + 3 - 2) x 10 = 17 x 10 - _____ x 10
14 x 10 = 17 x 10 - _____ x 10
17 x 10 - 14 x 10 = _____ x 10
(17 - 14) x 10 = _____ x 10

3 x 10 = _____ x 10

Answer(s): 9, 21, 12, 3