问题 解答题
脱式计算(能用简便方法的用简便方法计算)
[(
7
16
-
1
4
)+
15
16
1
2

61
3
4
-15.37+38
1
4
-34.63
23-
8
9
×
3
8
÷
1
27

5.8×99-4.2
10.6-(6.3+0.125÷12.5%)
答案

(1)[(

7
16
-
1
4
)+
15
16
1
2

=[

3
16
+
15
16
]÷
1
2

=

18
16
÷
1
2

=2.25;

(2)61

3
4
-15.37+38
1
4
-34.63,

=(61

3
4
+38
1
4
)-(15.37+34.63),

=100-50,

=50;

(3)23-

8
9
×
3
8
÷
1
27

=23-

3
9
÷
1
27

=23-9,

=14;

(4)5.8×99-4.2,

=5.8×(100-1)-4.2,

=580-5.8-4.2,

=580-(5.8+4.2),

=580-10,

=570;

(5)10.6-(6.3+0.125÷12.5%),

=10.6-(6.3+1),

=10.6-7.3,

=3.3.

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