(1)3.4-0.6=2.8 (2)
2
3 ÷
7
9 =
6
7 (3)
1
2 +
5 =
9
10 (4)50×60=3000
(5)4:0.5=8:1 (6)10 2=100 (7)1.25×0.8=1 (8)
5
6 ×0×12=0