358.
1)|m|+|n|
-1.8+2.6=0.8
2)|m|-|n|
6.43-1.95=4.48
3)|m|*|n|
5 целых 1/3 * 0.75
16/3*1/3=16/9=1 целая 7/9
4)|m|:|n|
0.56:0/14=4
360.
1)3*|-0.8|+0.9*6
3*0.8+0.9*6=7.8
2)5/8*|0.8|+|-4.5|:0.3
5/8* 0.8 +4.5:0.3
1/2+4.5^0.3
1/2+1.35=1 целая 17/20
3)5/12*|-4\5|+2.4:|-3.6|
5/12*4.5+2.4:3.6
1 целая 7/8+2.4:3.6
4 целые 11/40:3.6=1 целая 3/16
4)0.19+|-0.17|*3-|2.4|:6
0.19+0.17*3-2.46:6=0.3