2.12×2.7+7.88×2.7 24×10.2 1.25×0.25×3.2
①5.5×13.7+6.3×5.5 ②375+450÷18×25 ③32×0.125×2.5
①12.5×1.8×0.8
②78÷0.25÷0.4
③0.6×2.5+0.4×2.5
④0.85×(21.9﹣7.6÷4)
①836-192÷8×16
②1.4÷(1.4+0.7)
③0.8×0.4×12.5×0.25
④ ÷6+ ÷20
⑤14×19×( + )
⑥ ÷[( + )÷ ]