1) 34 +166 * 2 =34 +332 =366 2) 34 + ( 100 * 2 + 66 * 2 ) =366
85 * 8 - 85 *6 =680 - 510=170 85 * (8 - 6 ) =85 * 2 =170
600 : 15 + 150 : 15 = 40 +10 =50, ( 600 +150 ) : 15 =750 : 15 = 50
225 + 75 * 8 = 225 + 600 =825. 225 + ( 70 * 8 + 5 * 8 ) =825
810 : 9 - 630 : 9 = 90 - 70 = 20 (810 - 630 ) : 9 =180 : 9 =20
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