
计算:(1)(-23)×(13-12)÷19×(-2);(2)58×(-4)2-0.25×(-5)÷(-12)3.
计算:(1)(-23)×(13-12)÷19×(-2);(2)58×(-4)2-0.25×(-5)÷(-12)3....
计算:(1)(-23)×(13-12)÷19×(-2);(2)58×(-4)2-0.25×(-5)÷(-12)3.
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(1)原式=(-
)×(-
)×9×(-2),
=-(
×
×9×2),
=-2;
(2)原式=
×16-0.25×(-5)÷(-
),
=10-(-1.25)×(-8),
=10-10,
=0.
2 |
3 |
1 |
6 |
=-(
2 |
3 |
1 |
6 |
=-2;
(2)原式=
5 |
8 |
1 |
8 |
=10-(-1.25)×(-8),
=10-10,
=0.
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