题目内容
计算题
(1)(-20)+(-18)-(-14)
(2)(+
)-
-
+(-
)
(3)-36÷(
+
-
)
(4)-14-
×[3-(-3)2]
(5)(-
-
+
)÷
(6)(-2)3÷16-(-0.125)×(-4)2
(7)-8-[-7+(1-
×0.6)÷(-3)]
(8)|-
|÷(
-
)-
×(-4)2.
(1)(-20)+(-18)-(-14)
(2)(+
| 3 |
| 2 |
| 5 |
| 12 |
| 5 |
| 2 |
| 7 |
| 12 |
(3)-36÷(
| 1 |
| 2 |
| 5 |
| 6 |
| 7 |
| 12 |
(4)-14-
| 1 |
| 6 |
(5)(-
| 2 |
| 3 |
| 5 |
| 6 |
| 11 |
| 12 |
| 1 |
| 24 |
(6)(-2)3÷16-(-0.125)×(-4)2
(7)-8-[-7+(1-
| 2 |
| 3 |
(8)|-
| 7 |
| 9 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 3 |
(1)(-20)+(-18)-(-14)
=-38+14
=-24;
(2)(+
)-
-
+(-
)
=(
-
)-(
+
)
=-1-1
=-2;
(3)-36÷(
+
-
)
=-36÷
=-48;
(4)-14-
×[3-(-3)2]
=-1-
×[3-9]
=-1-
×[-6]
=-1+1
=0;
(5)(-
-
+
)÷
=(-
-
+
)×24
=-
×24-
×24+
×24
=-16-20+22
=-14;
(6)(-2)3÷16-(-0.125)×(-4)2
=-8÷16-(-0.125)×16
=-0.5+2
=1.5;
(7)-8-[-7+(1-
×0.6)÷(-3)]
=-8-[-7+(1-0.4)÷(-3)]
=-8-[-7+0.6÷(-3)]
=-8-[-7-0.2]
=-8+7.2
=-0.8;
(8)|-
|÷(
-
)-
×(-4)2
=
÷
-
×16
=
-
=-3
.
=-38+14
=-24;
(2)(+
| 3 |
| 2 |
| 5 |
| 12 |
| 5 |
| 2 |
| 7 |
| 12 |
=(
| 3 |
| 2 |
| 5 |
| 2 |
| 5 |
| 12 |
| 7 |
| 12 |
=-1-1
=-2;
(3)-36÷(
| 1 |
| 2 |
| 5 |
| 6 |
| 7 |
| 12 |
=-36÷
| 3 |
| 4 |
=-48;
(4)-14-
| 1 |
| 6 |
=-1-
| 1 |
| 6 |
=-1-
| 1 |
| 6 |
=-1+1
=0;
(5)(-
| 2 |
| 3 |
| 5 |
| 6 |
| 11 |
| 12 |
| 1 |
| 24 |
=(-
| 2 |
| 3 |
| 5 |
| 6 |
| 11 |
| 12 |
=-
| 2 |
| 3 |
| 5 |
| 6 |
| 11 |
| 12 |
=-16-20+22
=-14;
(6)(-2)3÷16-(-0.125)×(-4)2
=-8÷16-(-0.125)×16
=-0.5+2
=1.5;
(7)-8-[-7+(1-
| 2 |
| 3 |
=-8-[-7+(1-0.4)÷(-3)]
=-8-[-7+0.6÷(-3)]
=-8-[-7-0.2]
=-8+7.2
=-0.8;
(8)|-
| 7 |
| 9 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 3 |
=
| 7 |
| 9 |
| 7 |
| 15 |
| 1 |
| 3 |
=
| 5 |
| 3 |
| 16 |
| 3 |
=-3
| 2 |
| 3 |
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