计算题:(1)8+(-14)-(+5)-(-0.25);(2)(?34)×(?12)÷(?214);(3)(134?78?712)×(?117);(4
计算题:(1)8+(-14)-(+5)-(-0.25);(2)(?34)×(?12)÷(?214);(3)(134?78?712)×(?117);(4)17-(-8)÷(...
计算题:(1)8+(-14)-(+5)-(-0.25);(2)(?34)×(?12)÷(?214);(3)(134?78?712)×(?117);(4)17-(-8)÷(-2)+4×(-3);(5)[1?(1?0.5×13)]×[2?(?3)2];(6)?22?(?1)101×(13?12)÷16+(?1)100.
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(1)8+(-
)-(+5)-(-0.25)=8-
-5+
=3;
(2)(?
)×(?
)÷(?2
)=-[?
×(?
)×
]=-
;
(3)(1
?
?
)×(?1
)
=-
×
+
×
+
×
=-2+1+
=-
;
(4)17-(-8)÷(-2)+4×(-3)=17-4+(-12)=17-4-12=1;
(5)[1?(1?0.5×
)]×[2?(?3)2]
=[1-(1-
)]×(-7)
=[1-
]×7
=-
×7
=-
;
(6)?22?(?1)101×(
?
)÷
+(?1)100
=-4-(-1)×[?(
)]×6+1
=-4-1+1
=-4.
1 |
4 |
1 |
4 |
1 |
4 |
(2)(?
3 |
4 |
1 |
2 |
1 |
4 |
3 |
4 |
1 |
2 |
4 |
9 |
1 |
6 |
(3)(1
3 |
4 |
7 |
8 |
7 |
12 |
1 |
7 |
=-
7 |
4 |
8 |
7 |
7 |
8 |
8 |
7 |
7 |
12 |
8 |
7 |
=-2+1+
2 |
3 |
=-
1 |
3 |
(4)17-(-8)÷(-2)+4×(-3)=17-4+(-12)=17-4-12=1;
(5)[1?(1?0.5×
1 |
3 |
=[1-(1-
1 |
6 |
=[1-
5 |
6 |
=-
1 |
6 |
=-
7 |
6 |
(6)?22?(?1)101×(
1 |
3 |
1 |
2 |
1 |
6 |
=-4-(-1)×[?(
1 |
6 |
=-4-1+1
=-4.
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