题目内容

用递等式式计算.
16
27
×
1
7
+
5
27
÷7
(800×
1
4
-160)÷
1
2
62.7-59.4÷55×4.
(1)
16
27
×
1
7
+
5
27
÷7,
=(
16
27
+
5
27
)×
1
7

=
21
27
×
1
7

=
1
9


(2)(800×
1
4
-160)÷
1
2

=(200-160)÷
1
2

=40÷
1
2

=80;

(3)62.7-59.4÷55×4,
=62.7-1.08×4,
=62.7-4.32,
=58.38.
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