450-450÷18×15
3÷2.5+0.45×4.8
4.2÷[2.5-0.4×(2 .8 -1.05)]
205×4.4
15 -5.375-4
886%×2 +8.86×6.5+8.86
3000-450×14÷18
〔(8 —4.625)÷(2.4+1 )〕×50%
25.5×(0.32÷0.4)+8.6
6.8×4.5÷(3.2 - 2.95)
(13.68 - 8.4×1.05) ÷0.36
2.8×6.5÷(5.2- 4.95)
21.6×(1.46÷0.2 - 6.7)
45.55-(6.82+15.55) 34.52-17.87-12.23 6.43-(1.4-0.57)
23.75-8.64-3.46 17.83-9.5-7.83-0.5 5.38+88.2-2.38+1.8
27.38-5.34+2.62-4.66 21.63-(8.5+9.63) 7.5-2.45+7.5+2.45
0.9+0.99+0.999 5.09-(0.09+1.23) 9.36-(4.36-3.5)
9.9×99.9
=(10-0.1)×99.9
=999-9.99
=989.01
991%×5+9.91×91+0.991×40
=(5+91+4)×9.91
=991