计算:-13×2/3-0.34×2/7+1/3×(-13)-5/7×0.34.
问题描述:
计算:-13×
-0.34×2 3
+2 7
×(-13)-1 3
×0.34. 5 7
答
-13×
-0.34×2 3
+2 7
×(-13)-1 3
×0.345 7
=-13×
+2 3
×(-13)-0.34×1 3
-2 7
×0.345 7
=-13×(
+2 3
)-0.34×(1 3
+2 7
)5 7
=-13×1-0.34×1
=-13-0.34
=-13.34.