问题 解答题
计算.(能简算的要简算)
876+1529+124=
10-(9.62-2.8)=
42.8×4×25=
98÷(
1
15
÷
2
7
)=
1
5
÷3+
4
5
×
1
3
=
3
8
÷[(
1
5
+
1
4
)×
3
8
]=
答案

(1)876+1529+124

=(876+124)+1529,

=1000+1529,

=2529;

(2)10-(9.62-2.8)

=10-6.82,

=3.18;

(3)42.8×4×25

=42.8×(4×25),

=42.8×100,

=4280;

(4)98÷(

1
15
÷
2
7

=98×

2
7
÷
1
15

=28×15,

=420;

(5)

1
5
÷3+
4
5
×
1
3

=

1
5
×
1
3
+
4
5
×
1
3

=(

1
5
+
4
5
)×
1
3

=1×

1
3

=

1
3

(6)

3
8
÷[(
1
5
+
1
4
)×
3
8
]

=

3
8
÷
3
8
÷(
1
5
+
1
4
),

=1÷

9
20

=

20
9

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