计算:(1)-23+(+58)-(-5)(2)?434+7.4+4.75+235(3)(12+56?712)×(?36)(4)-125÷(-25)-64÷
计算:(1)-23+(+58)-(-5)(2)?434+7.4+4.75+235(3)(12+56?712)×(?36)(4)-125÷(-25)-64÷(-4)(5)(...
计算:(1)-23+(+58)-(-5)(2)?434+7.4+4.75+235(3)(12+56?712)×(?36)(4)-125÷(-25)-64÷(-4)(5)(?2)3×8?8×(12)3+8÷18(6)?14?16×[3?(?3)2]
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(1)-23+(+58)-(-5)
=-23+58+5
=-23+63
=40;
(2)?4
+7.4+4.75+2
=-4.75+4.75+7.4+2.6
=10;
(3)(
+
?
)×(?36)
=
×(-36)+
×(-36)-
×(-36)
=-18-30+21
=-48+21
=-27;
(4)-125÷(-25)-64÷(-4)
=5+16
=21;
(5)(?2)3×8?8×(
)3+8÷
=-8×8-8×
+8×8
=-64-1+64
=-1;
(6)?14?
×[3?(?3)2]
=-1-
×(3-9)
=-1-
×(-6)
=-1+1
=0.
=-23+58+5
=-23+63
=40;
(2)?4
3 |
4 |
3 |
5 |
=-4.75+4.75+7.4+2.6
=10;
(3)(
1 |
2 |
5 |
6 |
7 |
12 |
=
1 |
2 |
5 |
6 |
7 |
12 |
=-18-30+21
=-48+21
=-27;
(4)-125÷(-25)-64÷(-4)
=5+16
=21;
(5)(?2)3×8?8×(
1 |
2 |
1 |
8 |
=-8×8-8×
1 |
8 |
=-64-1+64
=-1;
(6)?14?
1 |
6 |
=-1-
1 |
6 |
=-1-
1 |
6 |
=-1+1
=0.
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