脱式计算.300-64×84÷284-1÷3- 1 3 ×8(2 4 5 +0.6÷ 6 35 )×2.

2025-01-02 05:33:02
推荐回答(1个)
回答1:

(1)300-64×84÷28,
=300-5276÷28,
=300-192,
=108;

(2)4-1÷3-
1
3
×8,
=4-
1
3
-
8
3

=4-(
1
3
+
8
3
),
=4-3,
=1;

(3)(2
4
5
+0.6÷
6
35
)×2.4,
=(2
4
5
+
7
2
)×2.4,
=6.3×2.4,
=15.12;

(4)[1
1
8
-(
13
20
+0.35)÷1
1
7
]×3.2,
=[1
1
8
-1÷1
1
7
]×3.2,
=[1
1
8
-
7
8
]×3.2,
=
2
8
×3.2,
=0.8.