Условие:

98080100;
64040 + 200;
290 + 70;
680 + 50;
140 * 6;
260 * 3;
480 : 6;
360 : 9.

98080100 = 900100 = 800;
64040 + 200 = 600 + 200 = 800;
290 + 70 = 360;
680 + 50 = 730;
140 * 6 = 840;
260 * 3 = 780;
480 : 6 = 80;
360 : 9 = 40.