用简便方法计算.58.26-13.6-6.4+1.7432.5÷2.5÷445×27+45×57+45
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/08/12 04:21:29
用简便方法计算.
58.26-13.6-6.4+1.74
32.5÷2.5÷4
45×
+45×
+45
58.26-13.6-6.4+1.74
32.5÷2.5÷4
45×
2 |
7 |
5 |
7 |
![用简便方法计算.58.26-13.6-6.4+1.7432.5÷2.5÷445×27+45×57+45](/uploads/image/z/3389467-67-7.jpg?t=%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97%EF%BC%8E58.26-13.6-6.4%2B1.7432.5%C3%B72.5%C3%B7445%C3%9727%2B45%C3%9757%2B45)
①58.26-13.6-6.4+1.74,
=(58.26+1.74)-(13.6+6.4),
=60-20,
=40;
②32.5÷2.5÷4,
=32.5÷(2.5×4),
=32.5÷10,
=3.25;
③45×
2
7+45×
5
7+45,
=45×(
2
7+
5
7+1),
=45×2,
=90.
=(58.26+1.74)-(13.6+6.4),
=60-20,
=40;
②32.5÷2.5÷4,
=32.5÷(2.5×4),
=32.5÷10,
=3.25;
③45×
2
7+45×
5
7+45,
=45×(
2
7+
5
7+1),
=45×2,
=90.