题目内容
| [________-（5.5+8.1）]×4.5=44.1 | 136÷[________-（4.8-2.6）]=27.2． |
23.4 7.2
分析：将空格当作未知数，根据等式的性质解方程即可求解．
解答：令空格为x，则
[x-（5.5+8.1）]×4.5=44.1，
x-（5.5+8.1）=9.8，
x-13.6=9.8，
x=23.4；
令空格为x，则
136÷[x-（4.8-2.6）]=27.2，
x-（4.8-2.6）=5，
x-2.2=5，
x=7.2．
故答案为：23.4；7.2．
点评：考查了解方程，本题关键是将空格当作未知数．
分析：将空格当作未知数，根据等式的性质解方程即可求解．
解答：令空格为x，则
[x-（5.5+8.1）]×4.5=44.1，
x-（5.5+8.1）=9.8，
x-13.6=9.8，
x=23.4；
令空格为x，则
136÷[x-（4.8-2.6）]=27.2，
x-（4.8-2.6）=5，
x-2.2=5，
x=7.2．
故答案为：23.4；7.2．
点评：考查了解方程，本题关键是将空格当作未知数．
练习册系列答案
阅读快车系列答案
相关题目
直接写得数．
| 0.8×6= | 0.05×1.6= | 2.5×5= | 8÷0.5= | 1.4×0.03= | 12×0.5×0.2= |
| 1.3÷4= | 1.876×0= | 4.6÷2.3= | 0.72÷4= | 1.23÷3= | 12-6.2-3.8= |
| 9.5×100= | 1.25×8 | 0.25×0.9×4= | 1.87×0= |
| 3.5-1.5= | 1.2×0.4= | 3.6×0.5= | 0.6×5= |
| 0.24+0.6= | 0.64×0.03= | 7.8+2.2-1.5= | 8×0.05= |
| 0.125×8= | 1.3×4= | 0.4×0.6= | 3×0.08= |
| 0.35×2= | 2.9×0.3= | 10-0.9= | 5.67×0= |
| 0.8×0.01= | 2.5×0.2= | 2.4×0.3= | 1.6×0.25= |
| 0.17×0.3= | 15×0.01= | 10×0.07= | 0.7×0.05= |
| 0.2×0.05= | 7.8×0.01= | 0.2×0.26= | 0.04×4= |
| 12.4+2.1= | 0.08×0.5= | 0.14×4= | 9×2.5+9×1.5= |
| 1.8×0.5= | 2.3×5= | 0.3×3.6= | 8×0.9+8×2.1= |
| 2.5×4= | 0.8+2.7×2= | 0.05×7= | 4.8+2.1+7.9= |
| 3.4-1.8= | 2.5+0.2×2= | 0.02×0.1= | 5.4-2.8= |
| 0.3×0.2= | 3.5×2×0.1= | 0.3×0.3= | 0×10.3×2.2= |
| 0.12×0.7= | 0.2×0.5= | 0.92×0.4= | 6.7-1.43= |
| 1.2×4= | 1.3×2= | 1.2×0.3= | 4.6+5.08= |