题目内容
计算:
(1)22+(-4)+(-2)+4;
(2)(-8)+(+0.25)-(-9)+(-
);
(3)(1
-
-
)×(-1
);
(4)(-
)÷(
-
-
);
(5)(1
+
-2.75)×(-24)-|-2|3;
(6)19×
-0.4×(-18)+
×(-19).
(1)22+(-4)+(-2)+4;
(2)(-8)+(+0.25)-(-9)+(-
| 1 |
| 4 |
(3)(1
| 3 |
| 4 |
| 7 |
| 8 |
| 7 |
| 12 |
| 1 |
| 7 |
(4)(-
| 7 |
| 30 |
| 3 |
| 5 |
| 1 |
| 6 |
| 2 |
| 3 |
(5)(1
| 1 |
| 3 |
| 1 |
| 8 |
(6)19×
| 2 |
| 5 |
| 2 |
| 5 |
(1)原式=22-2=20;
(2)原式=-8+
+9-
=1;
(3)原式=(
-
-
)×(-
)=
×(-
)-
×(-
)-
×(-
)=-2+1+
=-
;
(4)原式=-
÷(
-
-
)=-
÷(-
)=1;
(5)原式=(
+
-
)×(-24)-8=
×(-24)+
×(-24)-
×(-24)-8=-32-3+66-8=23;
(6)原式=(19+18-19)×
=18×
=
.
(2)原式=-8+
| 1 |
| 4 |
| 1 |
| 4 |
(3)原式=(
| 7 |
| 4 |
| 7 |
| 8 |
| 7 |
| 12 |
| 8 |
| 7 |
| 7 |
| 4 |
| 8 |
| 7 |
| 7 |
| 8 |
| 8 |
| 7 |
| 7 |
| 12 |
| 8 |
| 7 |
| 2 |
| 3 |
| 1 |
| 3 |
(4)原式=-
| 7 |
| 30 |
| 18 |
| 30 |
| 5 |
| 30 |
| 20 |
| 30 |
| 7 |
| 30 |
| 7 |
| 30 |
(5)原式=(
| 4 |
| 3 |
| 1 |
| 8 |
| 11 |
| 4 |
| 4 |
| 3 |
| 1 |
| 8 |
| 11 |
| 4 |
(6)原式=(19+18-19)×
| 2 |
| 5 |
| 2 |
| 5 |
| 36 |
| 5 |
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