题目内容
| χ+303=428 | χ-260=760 |
| χ-4.61=9 | 4.8+χ=5.2 |
| 590+χ=675 | χ-2.73=7.27. |
分析:(1)依据等式的性质,方程两边同时减303求解;
(2)依据等式的性质,方程两边同时加260求解;
(3)依据等式的性质,方程两边同时加4.61求解;
(4)依据等式的性质,方程两边同时减4.8求解;
(5)依据等式的性质,方程两边同时减590求解;
(6)依据等式的性质,方程两边同时加2.73求解.
(2)依据等式的性质,方程两边同时加260求解;
(3)依据等式的性质,方程两边同时加4.61求解;
(4)依据等式的性质,方程两边同时减4.8求解;
(5)依据等式的性质,方程两边同时减590求解;
(6)依据等式的性质,方程两边同时加2.73求解.
解答:解:(1)x+303=428
x+303-303=428-303
x=125;
(2)x-260=760
x-260+260=760+260
x=1020;
(3)x-4.61=9
x-4.61+4.61=9+4.61
x=13.61;
(4)4.8+x=5.2
4.8+x-4.8=5.2-4.8
x=0.4;
(5)590+x=675
590+x-590=675-590
x=85;
(6)x-2.73=7.27
x-2.73+2.73=7.27+2.73
x=10.
x+303-303=428-303
x=125;
(2)x-260=760
x-260+260=760+260
x=1020;
(3)x-4.61=9
x-4.61+4.61=9+4.61
x=13.61;
(4)4.8+x=5.2
4.8+x-4.8=5.2-4.8
x=0.4;
(5)590+x=675
590+x-590=675-590
x=85;
(6)x-2.73=7.27
x-2.73+2.73=7.27+2.73
x=10.
点评:等式的性质是解方程的依据,解方程时注意对齐等号.
练习册系列答案
相关题目
解方程.
|
(1)x +303=428x=( ) |
(2)x -4.61=9x=( ) |
解方程.
|
(1)x +303=428x=( ) |
(2)x -4.61=9x=( ) |