问题 填空题
3
7
+
6
7
+
3
7
+
6
7
=______×______;0.27×598≈______.
答案

(1)

3
7
+
6
7
+
3
7
+
6
7

=(

3
7
+
3
7
)+
6
7
+
6
7

=

6
7
+
6
7
+
6
7

=

6
7
×3;

(2)0.27×598,

=0.3×600,

≈180.

故答案为:

6
7
,3,180.

填空题
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