计算:-13×2/3-0.34×2/7+1/3×(-13)-5/7×0.34.

问题描述:

计算:-13×

2
3
-0.34×
2
7
+
1
3
×(-13)-
5
7
×0.34.

-13×

2
3
-0.34×
2
7
+
1
3
×(-13)-
5
7
×0.34
=-13×
2
3
+
1
3
×(-13)-0.34×
2
7
-
5
7
×0.34
=-13×(
2
3
+
1
3
)-0.34×(
2
7
+
5
7

=-13×1-0.34×1
=-13-0.34
=-13.34.