1.
36,63+9 3/4 - 6 9/10=36,63+9,75 - 6,9=39,48
58,75 - 21 9/10 +4 8/25=58,75 - 21,9 + 4,32=41,17
2.
(45,3 - 8,07)+(32,09 - 24,3)=45,3 - 8,07+32,09 - 24,3=(45,3 - 24,3)+(32,09 - 8,07)=23+24,02=45,02
(72 - 24,45)+(43 - 36,08)=72 - 24,45+43 - 36,08=(72+43)-(24,45+36,08)=115 - 60,53=54,47
3.
4,229
..-2,782...
1,447 1,447+2,782=4,229
26,875
...-...0,01.....
26,865 26,865+0,01=26,875
425,63
...-.148,35....
277,28 277,28+148,35=425,63