7200÷800= , 0.17+0.6= ,0.83-0.6=17×300=, 0.98-0.09=, 0.2+0.78=600×700=, 10.2+0.02=, 0.15+0.7=670+250= ,10.2+0.2= ,9.2-6=8500÷500= ;
3.2-3.2= ;
3.2-0.32= ;
2+2.8=380-290= ,0.35+0.5=, 0.35+0.63=3500÷70= ;
3.8+0.38=7500÷250=, 3.8+1= ,0.95-0.05=450+780= ;
3.1+0.3= ;
3+0.3=630÷9= ;
1.45+15×6= 135
2.250÷5×8=400
3.6×5÷2×4=60
4.30×3+8=98
5.400÷4+20×5= 200
6.10+12÷3+20=34
7.(80÷20+80)÷4=21
8.70+(100-10×5)=120
9.360÷40= 9
10.40×20= 800
11.80-25= 55
12.70+45=115
13.90×2= 180
14.16×6= 96
15.300×6= 1800