问题 解答题
选择最合理的方法进行计算
99
23
24
×24
4
3
5
×
7
9
-3
3
5
÷1
2
7
1
2
+1÷3.8×3
4
5
+3.5
(9
1
3
-3.25)÷2
1
2
+1.05
2
1
3
÷[(5
1
15
-3
3
5
)×15]
[5-(9
1
10
-4
1
5
)×
5
7
]÷1
1
2
答案

(1)99

23
24
×24,

=(99+

23
24
)×24,

=99×24+

23
24
×24,

=2376+23,

=2399;

(2)4

3
5
×
7
9
-3
3
5
÷1
2
7

=4

3
5
×
7
9
-3
3
5
×
7
9

=(4

3
5
-3
3
5
)×
7
9

=1×

7
9

=

7
9

(3)

1
2
+1÷3.8×3
4
5
+3.5,

=

1
2
+
5
19
×3
4
5
+3.5,

=

1
2
+1+3.5,

=1.5+3.5,

=5;

(4)(9

1
3
-3.25)÷2
1
2
+1.05,

=6

1
12
÷2
1
2
+1.05,

=

73
30
+1.05,

=3

29
30

(5)2

1
3
÷[(5
1
15
-3
3
5
)×15],

=2

1
3
÷[1
7
15
×15],

=2

1
3
÷[1
7
15
×15],

=2

1
3
÷22,

=

7
66

(6)[5-(9

1
10
-4
1
5
)×
5
7
]÷1
1
2

=[5-4

9
10
×
5
7
]÷1
1
2

=[5-

7
2
]÷1
1
2

=

3
2
÷1
1
2

=1.

判断题
填空题