计算.15
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:2024/07/05 05:35:36
计算.
1 |
5 |
![计算.15](/uploads/image/z/5241535-7-5.jpg?t=%E8%AE%A1%E7%AE%97%EF%BC%8E15)
①
1
5×37%+0.63×20%+43%
=0.2×(37%+0.63)+43%
=0.2+0.43
=0.63;
②98%×
1
4+2%×
1
4
=(98%+2%)×
1
4
=
1
4;
③80%x+90%x=68
1.7x÷1.7=68÷1.7
x=40;
④2x-60%x=9.6
1.4x÷1.4=9.6÷1.4
x=
48
7.
1
5×37%+0.63×20%+43%
=0.2×(37%+0.63)+43%
=0.2+0.43
=0.63;
②98%×
1
4+2%×
1
4
=(98%+2%)×
1
4
=
1
4;
③80%x+90%x=68
1.7x÷1.7=68÷1.7
x=40;
④2x-60%x=9.6
1.4x÷1.4=9.6÷1.4
x=
48
7.