题目

用递等式计算 ①1- ÷2.5 ② ×(15- ) ③ ÷( + ) ④3-1÷ × ⑤2-1.5× + ⑥0.12÷ +0.13× 答案:①1-56÷2.5 =1-56×25 =1-13 =23; ②115×(15-56) =115×15-115×56 =1-118 =1718; ③112÷(14+23) =112÷1112 =111; ④3-1÷73×314 =3-37×314 =3-998 =28998; ⑤2-1.5×16+34 =2-32×16+34 =2-14+34 =212; ⑥0.12÷38+0.13×83 =0.12×83+0.13×83 =(0.12+0.13)×83 =0.25×83 =14×83 =23。
数学 试题推荐
最近更新