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(1)计算:①-7+13-6+20;②1+(-2)+|-2-3|-5;③(23-14-38+524)×48④(-5)×(-7)-5×(-6);⑤(−23)÷(−85)÷(−0.25);⑥−2×(−12)2+|−(−2)|−(−12).

题目详情
(1)计算:
①-7+13-6+20;                 ②1+(-2)+|-2-3|-5;
③(
2
3
-
1
4
-
3
8
+
5
24
)×48         ④(-5)×(-7)-5×(-6);
(−
2
3
)÷(−
8
5
)÷(−0.25);     ⑥−2×(−
1
2
)2+|−(−2)|−(−
1
2
).


2
3
-
1
4
-
3
8
+
5
24
)×48         ④(-5)×(-7)-5×(-6);
(−
2
3
)÷(−
8
5
)÷(−0.25);     ⑥−2×(−
1
2
)2+|−(−2)|−(−
1
2
).
2
3
2233
1
4
-
3
8
+
5
24
)×48         ④(-5)×(-7)-5×(-6);
(−
2
3
)÷(−
8
5
)÷(−0.25);     ⑥−2×(−
1
2
)2+|−(−2)|−(−
1
2
).
1
4
1144
3
8
+
5
24
)×48         ④(-5)×(-7)-5×(-6);
(−
2
3
)÷(−
8
5
)÷(−0.25);     ⑥−2×(−
1
2
)2+|−(−2)|−(−
1
2
).
3
8
3388
5
24
)×48         ④(-5)×(-7)-5×(-6);
(−
2
3
)÷(−
8
5
)÷(−0.25);     ⑥−2×(−
1
2
)2+|−(−2)|−(−
1
2
).
5
24
552424
(−
2
3
)÷(−
8
5
)÷(−0.25);     ⑥−2×(−
1
2
)2+|−(−2)|−(−
1
2
).
2
3
2233
8
5
8855−2×(−
1
2
)2+|−(−2)|−(−
1
2
).
1
2
1122)2+|−(−2)|−(−
1
2
).
)2+|−(−2)|−(−
1
2
).
2+|−(−2)|−(−
1
2
).
1
2
1122
▼优质解答
答案和解析
(1)原式=-7-6+13+20=20;
(2)原式=1-2+5-5=-1;
(3)原式=
2
3
×48-
1
4
×48-
3
8
×48+
5
24
×48=32-12-18+10=12;
(4)原式=35+30=65;
(5)原式=-
2
3
×
5
8
×4=-
5
3

(6)原式=-2×
1
4
+2+
1
2
=2.
2
3
222333×48-
1
4
×48-
3
8
×48+
5
24
×48=32-12-18+10=12;
(4)原式=35+30=65;
(5)原式=-
2
3
×
5
8
×4=-
5
3

(6)原式=-2×
1
4
+2+
1
2
=2.
1
4
111444×48-
3
8
×48+
5
24
×48=32-12-18+10=12;
(4)原式=35+30=65;
(5)原式=-
2
3
×
5
8
×4=-
5
3

(6)原式=-2×
1
4
+2+
1
2
=2.
3
8
333888×48+
5
24
×48=32-12-18+10=12;
(4)原式=35+30=65;
(5)原式=-
2
3
×
5
8
×4=-
5
3

(6)原式=-2×
1
4
+2+
1
2
=2.
5
24
555242424×48=32-12-18+10=12;
(4)原式=35+30=65;
(5)原式=-
2
3
×
5
8
×4=-
5
3

(6)原式=-2×
1
4
+2+
1
2
=2.
2
3
222333×
5
8
×4=-
5
3

(6)原式=-2×
1
4
+2+
1
2
=2.
5
8
555888×4=-
5
3

(6)原式=-2×
1
4
+2+
1
2
=2.
5
3
555333;
(6)原式=-2×
1
4
+2+
1
2
=2.
1
4
111444+2+
1
2
=2.
1
2
111222=2.