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

(a) 90 x 7 + 3 x 90 = _____ x 90
(b) 16 x 9 + 9 x 5 + 9 x 4 = _____ x 9 + 9 x 9
(c) 194 x 10 - 6 x 194 = _____ x 194
(d) 16 x 8 + 5 x 8 - 8 x 8 = 19 x 8 - 8 x _____
(a)
90 x 7 + 3 x 90 = _____ x 90
7 x 90 + 3 x 90 = _____ x 90
(7 + 3) x 90 = _____ x 90

10 x 90 =  _____ x 90

(b)
16 x 9 + 9 x 5 + 9 x 4 = _____ x 9 + 9 x 9
(16 + 5 + 4) x 9 = = _____ x 9 + 9 x 9
25 x 9 = _____ x 9 + 9 x 9
25 x 9 - 9 x 9 = _____ x 9
(25 - 9) x 9 = _____ x 9

16 x 9 = _____ x 9

(c)
194 x 10 - 6 x 194 = _____ x 194
(10 - 6) x 194 = _____ x 194

4 x 194 = _____ x 194

(d)
16 x 8 + 5 x 8 - 8 x 8 = 19 x 8 - 8 x _____
(16 + 5 - 8) x 8 = 19 x 8 - _____ x 8
13 x 8 = 19 x 8 - _____ x 8
19 x 8 - 13 x 8 = _____ x 8
(19 - 13) x 8 = _____ x 8

6 x 8 = _____ x 8

Answer(s): 10, 16, 4, 6