130+200=
400÷2=
18×3=
8×9+12=
4×30=
520-190=
84÷4=
390-120+50=
0.89-0.25=
1-0.55=
14+0.78=
1-0.98=
3.7+4.8=
3+2.7=
0.9+0.1=
7+3.3=
5-0.08=
1-0.8=
3.2+0.7=
1.64+2.35=
4.5-4=
2.7+3.9=
1.1-1=
5.6+4=
0.7+0.9=
8.34-6.22=
5.7+3.3=
1-0.44=
12.6+3.4=
10-4.4=
0.9+1=
1.3+4.3=
6+6.6=
14.6-0.4=
7.2+6.9=
9.5-2.7=
10-0.1=
9.3-8.8=
①7.4﹣6.62+20.6﹣13.38
②×+×
③(-+)÷
④2×0.8×12.5×50%
⑤÷(÷+)
⑥×[1÷(+)]