题目内容
计算.
(1)0.81÷0.9-0.24
(2)(7+5.2)×2.5
(3)27.3÷(1.2×3.5)
(1)0.81÷0.9-0.24
(2)(7+5.2)×2.5
(3)27.3÷(1.2×3.5)
分析:(1)先算除法,再算减法;
(2)先算加法,再算乘法;
(3)先算乘法,再算除法.
(2)先算加法,再算乘法;
(3)先算乘法,再算除法.
解答:解:(1)0.81÷0.9-0.24
=0.9-0.24
=0.66;
(2)(7+5.2)×2.5
=12.2×2.5
=30.5;
(3)27.3÷(1.2×3.5)
=27.3÷4.2
=6.5.
=0.9-0.24
=0.66;
(2)(7+5.2)×2.5
=12.2×2.5
=30.5;
(3)27.3÷(1.2×3.5)
=27.3÷4.2
=6.5.
点评:考查了小数四则混合运算,先弄清运算顺序,然后再进一步计算.
练习册系列答案
相关题目