计算:(1)(-3)+(-4)-(+11)-(-9);(2)?534?[?1.5?(4.5?434)];(3)(23?112?115)×(?60);(4
计算:(1)(-3)+(-4)-(+11)-(-9);(2)?534?[?1.5?(4.5?434)];(3)(23?112?115)×(?60);(4)(?81)÷94...
计算:(1)(-3)+(-4)-(+11)-(-9);(2)?534?[?1.5?(4.5?434)];(3)(23?112?115)×(?60);(4)(?81)÷94×49÷(?16);(5)?14÷(?52)×(?53)+|0.8?1|;(6)14×(?23)÷45?(?8)÷[(?0.2)2?(?0.96) ] .
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(1)(-3)+(-4)-(+11)-(-9)=-3-4-11+9=-18+9=-9;
(2)?5
?[?1.5?(4.5?4
)]=-5
?(?1.5?4.5+4
)=-5
+1.5+4.5?4
=-
+6=?
;
(3)(
?
?
)×(?60)=
×(?60)?
×(?60)?
×(?60)=-40+5+4=-31;
(4)(?81)÷
×
÷(?16)=81×
×
×
=1;
(5)?14÷(?52)×(?
)+|0.8?1|=-1×(?
)×(?
)+0.2=-
+
=
;
(6)
×(?23)÷
?(?8)÷[(?0.2)2?(?0.96) ] =
×(?8)×(
)-(-8)÷(0.04+0.96)=-2.25-(-8)=5.75.
(2)?5
3 |
4 |
3 |
4 |
3 |
4 |
3 |
4 |
3 |
4 |
3 |
4 |
39 |
4 |
15 |
4 |
(3)(
2 |
3 |
1 |
12 |
1 |
15 |
2 |
3 |
1 |
12 |
1 |
15 |
(4)(?81)÷
9 |
4 |
4 |
9 |
4 |
9 |
4 |
9 |
1 |
16 |
(5)?14÷(?52)×(?
5 |
3 |
1 |
25 |
5 |
3 |
1 |
15 |
1 |
5 |
2 |
15 |
(6)
1 |
4 |
4 |
5 |
1 |
4 |
5 |
4 |
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