①7.63﹣0.54﹣(2.46﹣1.37)
②2.1×40%+ ×2.1
③ ÷[( + )× ]
0.19+0.1= 20×70%= 1﹣= 2.7×4×2.5=
7.53﹣0.03= += +×0= 0.99÷0.1=
76×24﹣824÷4 6.72﹣2.3÷0.5×0.8 19.2﹣10.2÷15﹣0.32
(+)÷ ÷7+× ÷[(+)×]
列式: