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①(+114)×(-2.4)×(-0.125);②0.1×(-100)×(-0.001)×(-10)×(-1000)×(-0.01);③(+2831)×(-127)×(+2115)×(-412);④(-375)×(-8)+(-375)×(-9)+375×(-7).
题目详情
①(+1
)×(-2.4)×(-0.125);
②0.1×(-100)×(-0.001)×(-10)×(-1000)×(-0.01);
③(+2
)×(-1
)×(+2
)×(-4
);
④(-375)×(-8)+(-375)×(-9)+375×(-7).
1 |
4 |
②0.1×(-100)×(-0.001)×(-10)×(-1000)×(-0.01);
③(+2
8 |
31 |
2 |
7 |
1 |
15 |
1 |
2 |
④(-375)×(-8)+(-375)×(-9)+375×(-7).
▼优质解答
答案和解析
①(+1
)×(-2.4)×(-0.125)
=
×
×
=
;
②0.1×(-100)×(-0.001)×(-10)×(-1000)×(-0.01)
=[0.1×(-10)]×[(-0.001)×(-1000)]×[(-100)×(-0.01)]
=-1×1×1
=-1;
③(+2
)×(-1
)×(+2
)×(-4
)
=
×(-
)×(+
)×(-
)
=27;
④(-375)×(-8)+(-375)×(-9)+375×(-7)
=(-375)×(-8-9+7)
=(-375)×(-10)
=3750.
1 |
4 |
=
5 |
4 |
12 |
5 |
1 |
8 |
=
3 |
8 |
②0.1×(-100)×(-0.001)×(-10)×(-1000)×(-0.01)
=[0.1×(-10)]×[(-0.001)×(-1000)]×[(-100)×(-0.01)]
=-1×1×1
=-1;
③(+2
8 |
31 |
2 |
7 |
1 |
15 |
1 |
2 |
=
70 |
31 |
9 |
7 |
31 |
15 |
9 |
2 |
=27;
④(-375)×(-8)+(-375)×(-9)+375×(-7)
=(-375)×(-8-9+7)
=(-375)×(-10)
=3750.
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