题目内容
计算或解方程
①13÷19+18×
②4.25+3
-1
+
-2
③
x=2+2x.
①13÷19+18×
| 13 |
| 19 |
②4.25+3
| 3 |
| 7 |
| 1 |
| 4 |
| 11 |
| 7 |
③
| 7 |
| 2 |
①13÷19+18×
,
=
+18×
,
=
×(1+18),
=13;
②4.25+3
-1
+
-2,
=4.25-2+(3
+
)-1
,
=2.25+5-1
,
=2
-1
+5,
=1+5,
=6;
③
x=2+2x,
(
-2)x=2,
x=2,
x=
.
| 13 |
| 19 |
=
| 13 |
| 19 |
| 13 |
| 19 |
=
| 13 |
| 19 |
=13;
②4.25+3
| 3 |
| 7 |
| 1 |
| 4 |
| 11 |
| 7 |
=4.25-2+(3
| 3 |
| 7 |
| 11 |
| 7 |
| 1 |
| 4 |
=2.25+5-1
| 1 |
| 4 |
=2
| 1 |
| 4 |
| 1 |
| 4 |
=1+5,
=6;
③
| 7 |
| 2 |
(
| 7 |
| 2 |
| 3 |
| 2 |
x=
| 4 |
| 3 |
练习册系列答案
相关题目