问题 填空题
1
4
×(4.85÷
5
18
-3.6+6.15×3
3
5
)+[5.5-1.75×(1
2
3
+
19
21
)]=______.
答案

1
4
×(4.85÷
5
18
-3.6+6.15×3
3
5
)+[5.5-1.75×(1
2
3
+
19
21
)]

=

1
4
×(4.85×
18
5
-3.6+6.15×
18
5
)+[5.5-1.75×
18
7
]

=

1
4
×[3.6×(4.85-1+6.15)]+[5.5-
7
4
×
18
7
]

=

1
4
×3.6×10+[5.5-4.5]

=9+1

=10;

故答案为:10.

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