计算 (能简算的要简算,解答时,必须写出必要的解题步骤)(1)[20.75+(3.74-212)÷92325]÷41.75(2

2025-04-09 20:14:58
推荐回答(1个)
回答1:

(1)[20.75+(3.74-2

1
2
)÷9
23
25
]÷41.75,
=[20.75+1.24÷9
23
25
]÷41.75,
=[20.75+0.125]÷41.75,
=20.875÷41.75,
=0.5;

(2)999
6
7
+99
6
7
+9
6
7
+
6
7

=999+
6
7
+99+
6
7
+9+
6
7
+
6
7

=(999+99+9)+(
6
7
+
6
7
+
6
7
+
6
7
),
=(1000+100+10-3)+(
6
7
×4),
=(1110-3)+
24
7

=1107+3
3
7

=1110
3
7


(3)(3.91+3
3
7
+6.09+6
4
7
)×( 2
1
8
-1.125)+(1÷
2
3
-1.5)×6.04,
=[(3.91+6.09)+(3
3
7
+6
4
7
)]×( 2
1
8
-1.125)+(1÷
2
3
-1.5)×6.04,
=(10+10)×( 2
1
8
-1.125)+(
3
2
-1.5)×6.04,
=20×1+0×6.04,
=20+0,
=20.