题目内容
计算:
(1)1-5+(-9);
(2)-3.14×35.2+31.4×(-4.66)-3.14×18.2;
(3)
-12×(
-
+
);
(4)-
×(-42)-(-3)3÷(-1)2009.
(1)1-5+(-9);
(2)-3.14×35.2+31.4×(-4.66)-3.14×18.2;
(3)
| 9 |
| 1 |
| 4 |
| 5 |
| 6 |
| 1 |
| 2 |
(4)-
| 5 |
| 8 |
(1)原式=1-5-9
=-13;
(2)原式=-3.14×35.2-3.14×46.6-3.14×18.2
=-3.14×(35.2+46.6+18.2)
=-3.14×100
=-314;
(3)原式=3-3+10-6
=4;
(4)原式=-
×(-16)-(-27)÷(-1)
=10-27
=-17.
=-13;
(2)原式=-3.14×35.2-3.14×46.6-3.14×18.2
=-3.14×(35.2+46.6+18.2)
=-3.14×100
=-314;
(3)原式=3-3+10-6
=4;
(4)原式=-
| 5 |
| 8 |
=10-27
=-17.
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