0.25×3.2×1.25
9
6.35﹣
69×75%+7.5×3.1
523﹣23×7
4.97+6.38+5.03﹣4.38
60×()
×3.2+5.6×0.5+1.2×50%
()÷
+= ﹣= 24×= 5﹣=
30÷= += +0.25= ÷=
①180-60÷12×24
②18-
③1.25×3.2×250
④
⑤24×()
⑥
①7.63﹣0.54﹣(2.46﹣1.37)
②2.1×40%+ ×2.1
③ ÷[( + )× ]