①520﹣450÷15
②1.2+4.92÷2.4
③0.8××12.5
④12÷×﹣
⑤(2.1+6.9÷0.15)÷0.1
⑥(0.25×3.2+0.8)×
⑦0.25÷(﹣)×2.4
2.3+5.7=
12.2﹣0.5=
140×0.3=
401﹣198=
3600÷12=
+ =
﹣ =
×240=
÷ =
25%×5.6÷ =
10﹣6.8= ﹣ = 35×1%= 1.25×24= 5× ÷5× =
0.42= 10÷0.02= 5a×7a= 1÷3= 1﹣1÷6=
8.9+3.01= 1- + = 1.2×5= 3.8÷0.038=
÷ = 3604÷62≈ 0.62-0.32= 1÷10%=
( - )×24= ×8÷ ×8=
①480+1040÷(704﹣688)
②7.4×4.5﹣2.6×5.5
③15.78﹣2.16+2.22﹣4.84
④(﹣)×24÷
⑤0.75×+×
⑥÷[(-)×]
2×35=70
420÷70=6
综合算式:
180÷15=12
32-12=20