计算下列各题(1)6+(-14)-9-(-0.25)(2)(-3)×(-9)-(-8)÷2(3)(-25)÷(-123)×(-4)
计算下列各题(1)6+(-14)-9-(-0.25)(2)(-3)×(-9)-(-8)÷2(3)(-25)÷(-123)×(-4)×(+123)(4)5-(-1)7÷0....
计算下列各题(1)6+(-14)-9-(-0.25)(2)(-3)×(-9)-(-8)÷2(3)(-25)÷(-123)×(-4)×(+123)(4)5-(-1)7÷0.5×2+(-2÷15)2-1(5)441116÷(-5)(6)-10×(-1)22+[9÷(-3)2-(-4)]×(-3)
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(1)6+(-
)-9-(-0.25)
=(6-9)+(-0.25+0.25)
=-3+0
=-3;
(2)(-3)×(-9)-(-8)÷2
=27+4
=-23;
(3)(-25)÷(-1
)×(-4)×(+1
)
=(-25)×(-
)×(-4)×
=--100;
(4)5-(-1)7÷0.5×2+(-2÷
)2-1
=5+1÷0.5×2+(-10)2-1
=5+4+100-1
=108;
(5)44
÷(-5)
=(45-
)÷(-5)
=-45÷5+
÷5
=-9+
=-8
;
(6)-10×(-1)22+[9÷(-3)2-(-4)]×(-3)
=-10×1+[9÷9-(-4)]×(-3)
=-10+[1-(-4)]×(-3)
=-10+[-5]×(-3)
=-10+15
=5.
1 |
4 |
=(6-9)+(-0.25+0.25)
=-3+0
=-3;
(2)(-3)×(-9)-(-8)÷2
=27+4
=-23;
(3)(-25)÷(-1
2 |
3 |
2 |
3 |
=(-25)×(-
3 |
5 |
5 |
3 |
=--100;
(4)5-(-1)7÷0.5×2+(-2÷
1 |
5 |
=5+1÷0.5×2+(-10)2-1
=5+4+100-1
=108;
(5)44
11 |
16 |
=(45-
5 |
16 |
=-45÷5+
5 |
16 |
=-9+
1 |
16 |
=-8
15 |
16 |
(6)-10×(-1)22+[9÷(-3)2-(-4)]×(-3)
=-10×1+[9÷9-(-4)]×(-3)
=-10+[1-(-4)]×(-3)
=-10+[-5]×(-3)
=-10+15
=5.
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