51×25%-27×
24×(+-)
1.25×16
14×(1-)÷
4.5÷× 37.36﹣6.37﹣13.63 ×(+)
(-+)÷ ×+87.5%× ×[-(-)]
1.05×(3.7﹣0.7)÷6.3 73×40%+27× -(+)×50%
①(2.3+2.3+2.3+2.3)×2.5
②7.2×85%+2.8×0.85
③( + - )×24
④ ÷[ ×( - )]
⑤[( -0.25)× +0.3]÷