1、四年级数学下册简便计算专项练习题85941505094125(86)999969301686892878879910125(20+4)522115229799997825961969696125(88)4747891001565623698361910125(40+4)34210134279999796425691989869125(88)252599301989861163916579925(24+4)35310135344994456125541464654125(84)1515997018484129888986510125(8+4)587100158797997825801171780
2、125(86)636339100140407634243471100125(32+4)568100156812991264125471555547125(84)343449401919188401240639925(8+4)4411001441259992532125411252541125(84)57575930170704158595832100125(32+4)18010011801699162425661121266125(810)707059101242488092803799925(20+4)5961001596379937825761323276125(88)5050391018
3、1817599359899925(16+4)48610014869499416125831888883125(86)8686894016262102790275610125(8+4)40010014003399334025571767657125(84)89898990166669182982719925(12+4)266100126658999585625581181858125(82)868629701757528817281929925(8+4)140111403499345625761161676125(88)9696895018585448056802899925(4+4)53710
4、0153749999498125931666693125(86)252569801767676232423529925(12+4)18811188159991540125631999963125(810)888839201808017699766699925(20+4)550101550479994732125381111138125(84)747459101444481951995609925(4+4)53711537309930825431686843125(88)1212498015757989229265100125(8+4)3851001385229222425931313193125(82)87872950124243482668263100125(8+4)56510015659899848125831676783125(88)43437920186864322572222100125(20+4)4541014547099706425931626293125(88)1212891001404087092703399925(32+4)58110015811699916825