1、517-53-47 284-159-41258-42-16545-167-145478-47-178344-(144+37)236-(177+36) 236-(136-87)第三类:乘4545 23 52 25948(12513)(250125)(48) 8812572 12564254212588125第四类:(12+50)40(40-4) 761031844 4225999 9978第五类:37+3755 2821+2879 1723-2373846+643832+32 46+46591672+1673+167398+639-3928225-2225-6225 (42+25)125+(18
2、+15)2324+252+2718+251 9922+3334 第六类:除3604 2505 600125800848048240124203524007800第七类:加减92+99197+102354-108405-99 127-98323+189-123 248-86+48 672-36+64(6467-832)+(1832-1467) 1530+(592-530)-192(2+4+6+98+100)-(1+3+5+97+99)第八类:乘除96046 9900012111 3702381234640(164) 1000(1254)第九类:加减乘除(98+147)49 (230-23)23 (250-25)173628+106428 125(860+24012)700+612124(37+15)85+1360200520062006-200620052005