题目

下面各题,怎样算简便就怎样算。 ① ② ③ ④ ⑤ ⑥ 答案:解:① 3.32+5.43+6.68 =3.32+6.68+5.43 =10+5.43 =15.43; ② 15.26−(6.26+3.58) =15.26-6.26-3.58 =9-3.58 =5.42; ③ 0.25×(4+8)×12.5 =0.25×12×12.5 =0.25×4×3×12.5 =3×12.5 =37.5; ④ (37−3.6÷4.8)÷2.5 =(37-0.75)÷2.5 =36.25÷2.5 =14.5; ⑤ 9.9×8.5 =(10-0.1)×8.5 =10×8.5-0.1×8.5 =85-0.85 =84.15; ⑥ 60÷2.5+60÷1.5 =24+40 =64
数学 试题推荐
最近更新