(1)5.58+16.2=21.78
5.58
+
16.2
;
21.78
(2)24.22-16.8=7.42
24.22
?
16.8
;
7.42
(3)98.8-64.35=34.45
98.8
?
64.35
;
34.45
(4)3.906+0.66=4.566
3.906
+
0.66
.
4.566