1. 5,707+8,293=1414-5,784=8,2168,216+6,5=14,71614,716-8=6,7166,716+1,384=8,12.15,09-5=10,0910,09+6,91=1717-9,684=7,3167,316+3,615=10,93110,931-2,731=8,23. 9-3,543=5,4575,457+0,543=66-5,3=0,70,7-0,3=0,40,4+0,5=0,99,2-0,9=8,34.28,046 -4,774=23,27223,272+8,228=31,531,5-30=1,51,5+0,5=22-1,8=0,28,6-0,2=8,45. 2,25+6,95=9,22-1,326=0,67415,2-9,2=66-1,334=4,6664,666+3,16=7,8267,826+0,674=8,56. 6,36+0,9=7,268-6,033=1,9671,967-0,967=12,27+0,07=2,342,34+7,26=9,69,6-1=8,67. 32,671-7,82=24,85124,851-7,99=16,8610,103+0,758=0,8613,3+4=7,316,861-0,861=1616-7,3=8,78. 6-2,189=3,8113,811-0,711= 3,13,1+0,9=413,81-5,41=8,408,40-4=4,404,40+4,4=8,8