1、直接写出得数。0.45×2．５＝０.8×1.25=0.3×3．６=０.３×0.３=1０×0.07＝０.3×１．4＝0.05×７＝0.92×0.4=0.2×0.26=0．14×4=０.０２×0.１＝1.２×0.3=0.２×０．4＝８.２+１.8=1０0－35．22=２.3×４＝2.５×0.4＝2.４×5=0.22×4=3．25×０=０.９-０．52=3.９9×1＝0×３．52＝12.5×８=1÷0．5=ﻫ8÷1０=1０-１．８-72．=.3０４＋357．=5２．×４×12=.0１５×10０＝ﻫ.9０×0.8＝09．６÷３=1.47÷07．=5.4÷6＝4÷08．=ﻫ0.1.5６×10=0.6５×100＝3.7８×10０＝3215．×100=.8０×0１=408．×100=.1１×.０２=6０．×0.8=3×0.9=2.5×4０．=6３．×4０．=12.5×8=5０×00．４=0８×0.3＝.1１×9=ﻫ.1０６×5=1.78+2.2=.6９÷6０．=1.２×0.5-04．＝.7０÷0.0１=２．５×0.4=12－.9３=1.25×8÷125．=6.6÷0.66＝5.37×０+4.6３＝4．２÷3.5＝1.６＋24．×03．=2.１４－9０．＝27+４５6+73=0.3×0.3=7．２＋2.8＝0.9÷0.01＝12÷０．３=2.87÷0.7=１３÷4＝.96０÷.０３=1.5×0.4＝7÷0.２５＝2.5×0.7×.8０=８-2.5=1６÷1.6＝5.6×1.01=8(×2.５＋.2０５)＝0.3６+064．＝6.3４２÷16＝2.8７÷08．＝8.4÷4.2=13.8+9.9=.２４×.5２＝.05０×0.8＝.25１×08．×0.5=2１×2．５=1.23×3=32．÷16．＝3.５＋5３．×３＝96１．÷2=8.8÷2.2=0.5７×４(=15．＋0.5２×)４＝0.5×0.8=8.４×0.２＝1.6×0.2＝７.2×０.3=２.8×0.3=0.9÷０.15＝1．8×0．4=5.5÷０．55＝0．0８×１00=2.２÷0.１1=5.４６+4.54＝１２.5×0．８=0.35×０．３=１.4×５=2.8×4=１９.6÷4＝22.5×４＝ﻫ2、用竖式计算ﻫ0.396÷1.2=.76０５÷0.36=1.6５×13=ﻫ0.18×15=0.02５×14＝3.06×36=0．04×0.12=３.84×２．6≈５.７6×3=（保留一位小数）ﻫ7.15×2207９．５÷3.36３．８×0.２ﻫ16.9÷０.131．55÷3.93．７×０．016ﻫﻫ176３．×0.8=52．×0.68.4×.3１ﻫ6.4×0.54．48×0．45.２５×5ﻫ54３．×4.20.042×0.540.76×3０．２0.25×0.０4６2.5２×３.４1.08×２５ﻫ0.12×0.5×0.16=.４８×0.5２=0.125×1.4（保留两位小数)ﻫﻫ2.５÷0.7=(保留三位小数）10.1÷3.3＝(商用循环小数)ﻫ10.７5÷１2．5=（用乘法验算)3.25×9.04=（用除法验算）３、脱式计算)能简算的要简算(2．5×７.1×41６.１2×99+１6.125.２×0.9＋0．９７.28×99+7．28４.3×５０×0.264－2.64×0．53.94＋３4.3×0.２ﻫ6２×157．＋15.7×24(227．５+062．５×（0.28１．２×（9.６÷2.4÷(48．8．9×１.1×4.72.7×５.4×3.9３.6×９.85-5.4６ﻫ8．0５×3．４＋７.66.58×4.5×0.９2.8×0.5＋1．58ﻫ32+４.9-0.9４.８-4．8×０．5(1.25-0.１2５）×8ﻫ4.８×10０.156.5×９9＋５6．57.09×10．8-0.8×7.０9ﻫ4.85+0.35÷14．.7８×17.４-8.７×7.４213．×．0×．8２57ﻫ12．5×0.4×2.５×8０.87×3.１6+4.649.5×１010.68÷（5.2－3.5)×1.25４.８×（15÷2.４）40.5÷0.81×0.1８ﻫﻫ6.8１+681．×990.25×85１×404.4×0.8－3.4×.8０.25０×39＋0.25ﻫ(9．37+9.37＋9.３７+9.3７）×2.５4.2.×1．+１．×1.7546×０.33+54×０.3２.37×6.3+２.３7×3.72.5×１.25×0.323.８×10.10.125×7２ﻫﻫ2.5(×3．8×0．04)7．6９×10１3.8×１0．1ﻫ
