练习课,1.比大小。,100011 99999,253957 254257,93604 903604,370300 307300,将这些数按从小到大的顺序排列!,2.把下面整万的数改写成用“万”作单位的数。,1100000= 万,1210000= 万,720000= 万,10030000= 万,110,121,72,1003,1550000,2100000,6000000,3780000,3781000,3780500,3.按要求完成表格。,4.下面省略万后面的尾数求近似数正确的有哪些?,45743=50000,390879400000,6400580065000000,63480 63500,9987051000000,1300643 130万,( ),( ),( ),( ),( ),( ),390000,64010000,60000,1300000,5.填表:,9370000,9600000,9970000,17080000,6.“”内能填哪些数?,5 4036万,27 207 27万,160 106 161万,23 999 24万,