<span>6 3/4 - 2х = 3 1/2
-2x= 3 1/2 - 6 3/4
-2x= -3 1/4
x= -3 1/4: -2
x= 1 5/8</span>
1) 695 + 471 = 1061
2) 368 - 195= 173
3) 873 + 109 = 982
4) 605 - 475 = 130
426+349=775
109+789=898
700-65=635
310-67=243
33+649=682
230-192=38
125:5=25
636:6=106
147:7=21
122*4=488
232*2=696
145*3=435