题目内容
计算:
(1)6×
-
x=
(2)3.7×3.7×
+1.3÷
.
(1)6×
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 2 |
(2)3.7×3.7×
| 6 |
| 5 |
| 5 |
| 6 |
考点:方程的解和解方程,分数的四则混合运算
专题:运算顺序及法则,简易方程
分析:(1)先化简再依据等式的性质,方程两边同时加
x,再减
,最后同乘上12即可;
(2)先把除法转化为乘法,再根据乘法的分配律计算.
| 1 |
| 12 |
| 1 |
| 2 |
(2)先把除法转化为乘法,再根据乘法的分配律计算.
解答:
解:(1)6×
-
x=
-
x=
-
x+
x=
+
x
+
x=
+
x-
=
-
x=0
x×12=0×12
x=0;
(2)3.7×
+1.3÷
=3.7×
+1.3×
=
×(3.7+1.3)
=
×5
=6.
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 12 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 2 |
| 1 |
| 12 |
| 1 |
| 2 |
| 1 |
| 12 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 12 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 12 |
| 1 |
| 12 |
x=0;
(2)3.7×
| 6 |
| 5 |
| 5 |
| 6 |
=3.7×
| 6 |
| 5 |
| 6 |
| 5 |
=
| 6 |
| 5 |
=
| 6 |
| 5 |
=6.
点评:本题考查了解方程与四则混合运算,熟练掌握等式性质,以及运算法则是解题的关键.
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