题目
递等式计算,能巧算的要巧算.
①4987+113×33
②64000÷125÷8
③(401﹣389)×36
④136×99+136
⑤(359﹣42)×53+47
⑥1300÷25×4
答案:解:①4987+113×33 =4987+3729 =8716 ②64000÷125÷8 =64000÷(125×8) =64000÷1000 =64 ③(401﹣389)×36 =12×36 =432 ④136×99+136 =136×(99+1) =136×100 =13600 ⑤(359﹣42)×53+47 =317×53+47 =16801+47 =16848 ⑥1300÷25×4 =52×4 =208