最好是递等式计算谢谢!
来源:学生作业帮 编辑:百度作业网作业帮 分类:数学作业 时间:2024/06/26 04:28:59
最好是递等式计算谢谢!
1)3.7×1.4×0.05
2)2.7×3.7+0.37×73
3)2.3×6.7-9.24
4)1.25×23×1.6
5)16.5×9.9
6)0.64+0.36×0.25
7)3.9×7.8+39×0.12+3.9
8)3.05-2.05×1.4
1)3.7×1.4×0.05
2)2.7×3.7+0.37×73
3)2.3×6.7-9.24
4)1.25×23×1.6
5)16.5×9.9
6)0.64+0.36×0.25
7)3.9×7.8+39×0.12+3.9
8)3.05-2.05×1.4
![最好是递等式计算谢谢!](/uploads/image/z/7853562-18-2.jpg?t=%E6%9C%80%E5%A5%BD%E6%98%AF%E9%80%92%E7%AD%89%E5%BC%8F%E8%AE%A1%E7%AE%97%E8%B0%A2%E8%B0%A2%21)
1)3.7×1.4×0.05
=3.7×0.07
=0.259
2)2.7×3.7+0.37×73
=3.7×(2.7+7.3)
=3.7×10
=37
3)2.3×6.7-9.24
=15.41-9.24
=6.17
4)1.25×23×1.6
=1.25×8×2.3×2
=10×4.6
=46
5)16.5×9.9
=16.5×(10-0.1)
=165-1.65
=163.35
6)0.64+0.36×0.25
=0.64+0.09
=0.73
7)3.9×7.8+39×0.12+3.9
=3.9×(7.8+1.2+1)
=3.9×10
=39
8)3.05-2.05×1.4
=1+2.05-2.05×1.4
=1-2.05×0.4
=1-0.82
=0.18
=3.7×0.07
=0.259
2)2.7×3.7+0.37×73
=3.7×(2.7+7.3)
=3.7×10
=37
3)2.3×6.7-9.24
=15.41-9.24
=6.17
4)1.25×23×1.6
=1.25×8×2.3×2
=10×4.6
=46
5)16.5×9.9
=16.5×(10-0.1)
=165-1.65
=163.35
6)0.64+0.36×0.25
=0.64+0.09
=0.73
7)3.9×7.8+39×0.12+3.9
=3.9×(7.8+1.2+1)
=3.9×10
=39
8)3.05-2.05×1.4
=1+2.05-2.05×1.4
=1-2.05×0.4
=1-0.82
=0.18