题目内容
计算:
(1)0.47-4
-(-1.53)-1
;
(2)(
-
+
)×(-30);
(3)-15-[-1-(4-20)];
(4)(
-
)÷1
÷
×
;
(5)16÷(-2)-(-
)×(-4)2+(-1)2009;
(6)
+
+
+…+
;
(7)100+16÷(-2)4-
×(-5)2-|-100|;
(8)-14-[2-(1-
×0.5)]×[32-(-2)2].
(1)0.47-4
5 |
6 |
1 |
6 |
(2)(
9 |
10 |
1 |
15 |
1 |
6 |
(3)-15-[-1-(4-20)];
(4)(
1 |
3 |
1 |
2 |
1 |
4 |
1 |
10 |
10 |
3 |
(5)16÷(-2)-(-
1 |
8 |
(6)
1 |
1×2 |
1 |
2×3 |
1 |
3×4 |
1 |
1999×2000 |
(7)100+16÷(-2)4-
1 |
5 |
(8)-14-[2-(1-
1 |
3 |
(1)原式=(0.47+1.53)+(-4
-1
)
=2-6
=-4;
(2)原式=-
×30+
×30-
×30
=-27+2-5
=-30;
(3)原式=-15-[-1-(-16)]
=-15-(-1+16)
=-15-15
=-30;
(4)原式=-
×
×10×
=-
;
(5)原式=-8+
×16-1
=-8+2-1
=-7;
(6)原式=1-
+
-
+…+
-
=1-
=
;
(7)原式=100+16÷16-
×25-100
=100+1-5-100
=-4;
(8)原式=-1-[2-(1-
×
)]×[9-4]
=-1-[2-(1-
)]×5
=-1-1
×5
=-1-5
=-6
.
5 |
6 |
1 |
6 |
=2-6
=-4;
(2)原式=-
9 |
10 |
1 |
15 |
1 |
6 |
=-27+2-5
=-30;
(3)原式=-15-[-1-(-16)]
=-15-(-1+16)
=-15-15
=-30;
(4)原式=-
1 |
6 |
4 |
5 |
10 |
3 |
=-
40 |
9 |
(5)原式=-8+
1 |
8 |
=-8+2-1
=-7;
(6)原式=1-
1 |
2 |
1 |
2 |
1 |
3 |
1 |
1999 |
1 |
2000 |
=1-
1 |
2000 |
=
1999 |
2000 |
(7)原式=100+16÷16-
1 |
5 |
=100+1-5-100
=-4;
(8)原式=-1-[2-(1-
1 |
3 |
1 |
2 |
=-1-[2-(1-
1 |
6 |
=-1-1
1 |
6 |
=-1-5
5 |
6 |
=-6
5 |
6 |
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