Use distributive law and evaluate :

(i) 576 x 285 + 576 x 115

(ii) 385 x 178 - 385 x 78

(iii) 365 x 645 + 135 x 645

(iv) 407 x 168 - 307 x 168

Using the most convenient grouping, find each of the following products :

(i) 5 x 648 x 20

(ii) 8 x 329 x 25

(iii) 8 x 12 x 25 x 7

(iv) 125 x 40 x 8 x 25

Verify each of the following :

(i) 2867 + 986 = 986 + 2867

(ii) 368 x 215 = 215 x 368

(iii) (156 + 273) + 74 = 156 + (273 + 74)

(iv) (86 x 55) x 110 = 86 x (55 x 110)

Simplify :

(i) 39 - 18 ÷ 3 + 2 x 3

(ii) 8 + 2 x 5

(iii) 5 x 8 - 6 ÷ 2

(iv) 19 - 9 x 2

(v) 15 ÷ 5 x 4 ÷ 2