问题 解答题
9999×2222+3333×3334
96%×25+7.5×10%+0.25
666.6×888.8÷(4444×33.33)
1
2
+
1
6
+
1
12
+
1
20
+
1
30

(1+
1
2
)×(1-
1
2
)
×(1+
1
3
)
×(1-
1
3
)
×…×(1+
1
99
)×(1-
1
99
)
答案

9999×2222+3333×3334,

=3333×6666+3333×3334,

=3333×(6666+3334),

=3333×10000,

=33330000;

96%×25+7.5×10%+0.25,

=96%×25+25×3%+25×0.01,

=(96%+3%+0.01)×25,

=1×25,

=25;

666.6×888.8÷(4444×33.33),

=(666.6÷33.33)×(888.8÷4444),

=20×0.2,

=4;

1
2
+
1
6
+
1
12
+
1
20
+
1
30

=1-

1
2
+
1
2
-
1
3
+
1
3
-
1
4
+
1
4
-
1
5
+
1
5
-
1
6

=1-

1
6

=

5
6

(1+

1
2
)×(1-
1
2
)
×(1+
1
3
)
×(1-
1
3
)
×…×(1+
1
99
)×(1-
1
99
)

=

3
2
×
1
2
×
4
3
×
2
3
×…×
100
99
×
98
99

=

1
2
×
100
99

=

50
99

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