问题
解答题
简算下面各题(写出简算过程): 3.14×
18.7-3.375-6.625. |
答案
①3.14×
+3.14×1 5 4 5
=3.14×(
+1 5
)4 5
=3.14×1
=3.14;
②18.7-3.375-6.625
=18.7-(3.375+6.625)
=18.7-10
=8.7.
简算下面各题(写出简算过程): 3.14×
18.7-3.375-6.625. |
①3.14×
+3.14×1 5 4 5
=3.14×(
+1 5
)4 5
=3.14×1
=3.14;
②18.7-3.375-6.625
=18.7-(3.375+6.625)
=18.7-10
=8.7.