题目内容
计算:
(1)(-12)÷4×(-6)÷2;
(2)(-
)×(-4)2-0.25×(-5)×(-4)3;
(3)(-1
)-1
+(-2
)-(-3
)-(-1
);
(4)(-3)2÷2
×(-
)2+4-22×(-
);
(5)|
+
×(-12)÷6-(-3)2|+|24+(-3)2|×(-5);
(6)1+3+5+…+99-(2+4+6+…+98).
(1)(-12)÷4×(-6)÷2;
(2)(-
| 5 |
| 8 |
(3)(-1
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 4 |
(4)(-3)2÷2
| 1 |
| 4 |
| 2 |
| 3 |
| 1 |
| 3 |
(5)|
| 4 |
| 5 |
| 2 |
| 3 |
(6)1+3+5+…+99-(2+4+6+…+98).
(1)原式=(-12)×
×(-6)×
=(-3)×(-6)×
=18×
=9;
(2)原式=(-
)×16-
×(-5)×(-4)2×(-4)
=-10-80
=-90;
(3)原式=-
-
-
+
+
=(-
-
)-(
-
-
)
=-4+
=-
;
(4)原式=9×
×
+4-4×(-
)
=
+4+
=
+4
=
;
(5)原式=|
+
×(-12)×
-9|+|24+9|×(-5)
=|
-
-9|+|33|×(-5)
=|-9
|-165
=-155
;
(6)原式=1+(3-2)+(5-4)+…+(99-98)
=1+1+1+…+1
=50.
| 1 |
| 4 |
| 1 |
| 2 |
=(-3)×(-6)×
| 1 |
| 2 |
=18×
| 1 |
| 2 |
=9;
(2)原式=(-
| 5 |
| 8 |
| 1 |
| 4 |
=-10-80
=-90;
(3)原式=-
| 3 |
| 2 |
| 5 |
| 4 |
| 5 |
| 2 |
| 15 |
| 4 |
| 5 |
| 4 |
=(-
| 3 |
| 2 |
| 5 |
| 2 |
| 5 |
| 4 |
| 15 |
| 4 |
| 5 |
| 4 |
=-4+
| 15 |
| 4 |
=-
| 1 |
| 4 |
(4)原式=9×
| 4 |
| 9 |
| 4 |
| 9 |
| 1 |
| 3 |
=
| 16 |
| 9 |
| 4 |
| 3 |
=
| 16+12 |
| 9 |
=
| 64 |
| 9 |
(5)原式=|
| 4 |
| 5 |
| 2 |
| 3 |
| 1 |
| 6 |
=|
| 4 |
| 5 |
| 4 |
| 3 |
=|-9
| 8 |
| 15 |
=-155
| 7 |
| 15 |
(6)原式=1+(3-2)+(5-4)+…+(99-98)
=1+1+1+…+1
=50.
练习册系列答案
相关题目