题目内容
先说一说每道题的运算顺序,再计算. 3.95+1.2×5.2 |
10.79-4.2×0.8 |
0.9×24.5一10.8 | 2.3×4.8×2.7. |
分析:(1)先算乘法,再算加法;
(2)先算乘法,再算减法;
(3)先算乘法,再算减法;
(4)按照从左向右的顺序进行计算.
(2)先算乘法,再算减法;
(3)先算乘法,再算减法;
(4)按照从左向右的顺序进行计算.
解答:解:
(1)3.95+1.2×5.2,
=3.95+6.24,
=10.19;
(2)10.79-4.2×0.8,
=10.79-3.36,
=7.43;
(3)0.9×24.5-10.8,
=22.05-10.8,
=11.25;
(4)2.3×4.8×2.7,
=110.4×2.7,
=29.808.
(1)3.95+1.2×5.2,
=3.95+6.24,
=10.19;
(2)10.79-4.2×0.8,
=10.79-3.36,
=7.43;
(3)0.9×24.5-10.8,
=22.05-10.8,
=11.25;
(4)2.3×4.8×2.7,
=110.4×2.7,
=29.808.
点评:考查了四则混合运算的运算法则,然后根据运算顺序进行计算.
练习册系列答案
相关题目