3.
a) 2,4×10+59:10-18:2,5=
24+5,9-180:25=
24+5,9-7,2=
29,9-7,2=22,7
b) 1,2^2+2,1^2-0,0017×1000=
1,44+4,41-1,7=
5,85-1,7=4,15
c) 400:200-1,73:10+5,6×4,5=
2-0,173+25,2=
1,827+25,2=27,027
d) 29:100+3,7×4-123:100=
0,29+14,8-1,23=
15,09-1,23=13,86
e) 62:10-0,02×10+28,5×2,2=
6,2-0,2+62,7=
6+62,7=68,7
f) 3,9×100+3,9:100-3,9^2=
390+0,039-15,21=
390,039-15,21=374,829
4.
a) 4,71×10-3,7=
47,1-3,7=43,4
b) 29,56-5+14,8×7,2=
29,56-5+106,56=
24,56+106,56=131,12
c) 81,4-3,1×10,8=
81,4-33,48=47,92
d) 7,8:2+9,6×3,2
3,9+30,72=34,62
e) 14,49:7-0,026×13=
2,07-0,338=1,732
f) 41,41:41+2×2×2=
1,01+8=9,01
