①78.45－1.7+21.55
②125×16×26
③0.9+99×0.9
④12.7+0.98+3.02+5.3
⑤5.6－1.71－0.29
⑥102×52
①101×27 ②125×32×25 ③12.85-4.2+3.15-5.8
④9.25-3.75+1.25 ⑤2000÷125÷8 ⑥240×66+340×24
①37.3-3.7-7.3
②7800÷[(315-289)×5]
③85000÷(125×85)
④(28+28+28+28)×25
⑤99×59+59
⑥35.58+63.7+4.42-3.3
56+56×99 22.6+5.5+7.4
①25×280 ②51.27﹣8.66﹣1.27 ③78×115﹣78×14﹣78
④67×102 ⑤168×[（573﹣248）÷13] ⑥15.68+9.82﹣1.68+12.18
139×40×25
437×28 + 63×28
99×45
（90 + 25）×4
185×19 + 185
125×808
放69本书，4号书架放45本书