题目内容
【题目】直接写出得数.
5.7+11.8+4.3= 2﹣+= (+)×24= 0.32﹣0.22=
33×98+66= 10.1×99﹣9.9= 4﹣(+0.5)= :=
8×12.5%= =
【答案】21.8,2,7,0.05,3300,990,3.5,,1,0.75
【解析】
试题分析:(1)(2)运用加法交换律和结合律解答,
(3)(5)(6)运用乘法分配律解答,
(4)根据求一个数的平方计算方法解答,
(7)依据减法性质解答,
(8)依据比例基本性质解答,
(9)依据小数四则运算计算方法解答,
(10)依据除法性质解答.
解:5.7+11.8+4.3=21.8; 2﹣+=2; (+)×24=7; 0.32﹣0.22=0.05;
33×98+66=3300; 10.1×99﹣9.9=990; 4﹣(+0.5)=3.5; :=;
8×12.5%=1; =0.75.
故答案依次为:21.8,2,7,0.05,3300,990,3.5,,1,0.75.
练习册系列答案
相关题目