计算:(1)?14+56+23?12(2)?23÷49×(?23)2(3)(?12557)÷(?5)(4)(-2)2+(-3)×[(-4)2+2]-(-
计算:(1)?14+56+23?12(2)?23÷49×(?23)2(3)(?12557)÷(?5)(4)(-2)2+(-3)×[(-4)2+2]-(-3)2÷(-2)...
计算:(1)?14+56+23?12(2)?23÷49×(?23)2(3)(?12557)÷(?5)(4)(-2)2+(-3)×[(-4)2+2]-(-3)2÷(-2)
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(1)?
+
+
?
=-
+
+
-
=
;
(2)?23÷
×(?
)2
=-8×
×
=-8;
(3)(?125
)÷(?5)
=25
;
(4)(-2)2+(-3)×[(-4)2+2]-(-3)2÷(-2)
=4+(-3)×18-9÷(-2)
=4-5.5.
| 1 |
| 4 |
| 5 |
| 6 |
| 2 |
| 3 |
| 1 |
| 2 |
=-
| 3 |
| 12 |
| 10 |
| 12 |
| 8 |
| 12 |
| 6 |
| 12 |
=
| 1 |
| 2 |
(2)?23÷
| 4 |
| 9 |
| 2 |
| 3 |
=-8×
| 9 |
| 4 |
| 4 |
| 9 |
=-8;
(3)(?125
| 5 |
| 7 |
=25
| 1 |
| 7 |
(4)(-2)2+(-3)×[(-4)2+2]-(-3)2÷(-2)
=4+(-3)×18-9÷(-2)
=4-5.5.
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