计算:7×5.4+5.4×2-5.4=?7/8÷7/2×20%

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/06 12:35:10
计算:7×5.4+5.4×2-5.4=?7/8÷7/2×20%

计算:7×5.4+5.4×2-5.4=?7/8÷7/2×20%
计算:7×5.4+5.4×2-5.4=?7/8÷7/2×20%

计算:7×5.4+5.4×2-5.4=?7/8÷7/2×20%
7×5.4+5.4×2-5.4=5.4×(7+2-1)
=5.4×8
=43.2
7/8÷7/2×20%=7/8×2/7×1/5
=2/8×1/5
=1/4×1/5
=1/20
=0.05

7×5.4+5.4×2-5.4
=5.4×(7+2-1)
=5.4×8
=43.2
7/8÷7/2×20%
=7/8×2/7×20%
=1/4×20%
= 0.05

第一题: = (7+2-1)*5.4=43.2
第二题: =7/8 * 2/7 * 1/5=1/20

7×5.4+5.4×2-5.4=(7+2-1)×5.4=9×5.4=48.6
7/8÷7/2×20%=7/8×2/7×1/5=1/20