题目
递等式计算(能巧算的要巧算)
①54+46×10
②(620+190)÷90
③53×106-53×6
④720÷80×26
⑤250×(576÷64)
⑥25×12÷75
答案:解:①54+46×10 =54+460 =514 ②(620+190)÷90 =810÷90 =9 ③53×106-53×6 =(106-6)×53 =100×53 =5300 ④720÷80×26 =9×26 =234 ⑤250×(576÷64) =250×9 = 2250 ⑥25×12÷75 =300÷75 =4