题目
脱式计算,能简算的要简算。
①6.07-4.5+0.98
②29×(65-560÷16)
③1500÷25×4
④37.61-(7.61+1.25)
⑤99×23+23
⑥1428÷[(103-89)×6]
答案:①6.07-4.5+0.98 =1.57+0.98 =2.55 ②29×(65-560÷16) =29×(65-35) =29×30 =870 ③1500÷25×4 =60×4 =240 ④37.61-(7.61+1.25) =37.61-7.61-1.25 =30-1.25 =28.75 ⑤99×23+23 =(99+1)×23 =100×23 =2300 ⑥1428÷[(103-89)×6] =1428÷(14×6) =1428÷84 =17