
计算(1)(+13)?(+12)?(?16)(2)(-5)×3+(-6)÷(-2)(3)-14×(-5)÷[(-3)2+2×(-5)](4)(
计算(1)(+13)?(+12)?(?16)(2)(-5)×3+(-6)÷(-2)(3)-14×(-5)÷[(-3)2+2×(-5)](4)(34?16?112)×(?4...
计算(1)(+13)?(+12)?(?16)(2)(-5)×3+(-6)÷(-2)(3)-14×(-5)÷[(-3)2+2×(-5)](4)(34?16?112)×(?48)(5)41×3?83×5+125×7?167×9…?4019×21(用简便方法计算,并写出过程)
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(1)原式=
?
+
=-
+
=0;
(2)原式=-15+3=-12.
(3)原式=5÷(9-10)
=5÷(-1)
=-5.
(4)原式=
×(?48)+(?
)×(?48)+(?
)×(?48)
=-36+8+4
=-24.
(5)原式=?(
+
)
=1?
=
.
1 |
3 |
1 |
2 |
1 |
6 |
=-
1 |
6 |
1 |
6 |
=0;
(2)原式=-15+3=-12.
(3)原式=5÷(9-10)
=5÷(-1)
=-5.
(4)原式=
3 |
4 |
1 |
6 |
1 |
12 |
=-36+8+4
=-24.
(5)原式=?(
1 |
19 |
1 |
20 |
=1?
1 |
21 |
=
20 |
21 |
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