计算下列各题(1)56÷23?13×(?9)2+32(2)(?24)×(112?16+38)(3)3.14×6.49+3.14×(-5.49)-9×(-3
计算下列各题(1)56÷23?13×(?9)2+32(2)(?24)×(112?16+38)(3)3.14×6.49+3.14×(-5.49)-9×(-3.14)(4)(...
计算下列各题(1)56÷23?13×(?9)2+32(2)(?24)×(112?16+38)(3)3.14×6.49+3.14×(-5.49)-9×(-3.14)(4)(?112)2?(?23+12)÷(?16)3.
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(1)
÷
-
×(改野滚-9)2+32,
=
×
-
×81+9,
=
-27+9,
=-
;
(2)(-24)×(
-
+
),
=
×(-24)-
×(-24)+
×(核余-24),
=-2+4-9,
=-11+4,
=-7;
(3)3.14×6.49+3.14×(-5.49)-9×(-3.14)
=3.14×(6.49-5.49+9),
=3.14×10,
=31.4;
(4)脊羡(-1
)2-(-
+
)÷(-
)3,
=
-(-
)×(-216),
=
-36,
=-
.
5 |
6 |
2 |
3 |
1 |
3 |
=
5 |
6 |
3 |
2 |
1 |
3 |
=
5 |
4 |
=-
67 |
4 |
(2)(-24)×(
1 |
12 |
1 |
6 |
3 |
8 |
=
1 |
12 |
1 |
6 |
3 |
8 |
=-2+4-9,
=-11+4,
=-7;
(3)3.14×6.49+3.14×(-5.49)-9×(-3.14)
=3.14×(6.49-5.49+9),
=3.14×10,
=31.4;
(4)脊羡(-1
1 |
2 |
2 |
3 |
1 |
2 |
1 |
6 |
=
9 |
4 |
1 |
6 |
=
9 |
4 |
=-
135 |
4 |
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