摘要:判断正误:对的画“√ .错的画“× . (1)53+53=56, ( ) (2)a3·a4=a12, ( ) (3)b5·b5=2b5, ( ) (4)c·c3=c3, ( ) (5)m3·n2=m5. ( )
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判断正误:对的画“√”,错的画“×”.
(1)(
)2=7;( )
(2)
=7;( )
(3)(
)2=-7;( )
(4)(-
)2=7;( )
(5)-(
)2=7;( )
(6)
=-7;( )
(7)
=-7;( )
(8)
=7. ( )
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(1)(
| 7 |
(2)
| 72 |
(3)(
| -7 |
(4)(-
| 7 |
(5)-(
| 7 |
(6)
| -72 |
(7)
| (-7)2 |
(8)
| (-7)2 |
判断正误:对的画“√”,错的画“×”.
(1)
+
=
;( )
(2)
-
=
;( )
(3)2+
=2
;( )
(4)3
-
=3;( )
(5)2
+
=2
;( )
(6)4
-
=3
.( )
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(1)
| 2 |
| 3 |
| 5 |
(2)
| 8 |
| 3 |
| 5 |
(3)2+
| 2 |
| 2 |
(4)3
| 2 |
| 2 |
(5)2
| 2 |
| 2 |
| 2 |
(6)4
| 3 |
| 3 |
| 3 |
判断正误:对的画“√”,错的画“×”.
(1)(
)2=7;(______)
(2)
=7;(______)
(3)(
)2=-7;(______)
(4)(-
)2=7;(______)
(5)-(
)2=7;(______)
(6)
=-7;(______)
(7)
=-7;(______)
(8)
=7. (______)
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(1)(
| 7 |
(2)
| 72 |
(3)(
| -7 |
(4)(-
| 7 |
(5)-(
| 7 |
(6)
| -72 |
(7)
| (-7)2 |
(8)
| (-7)2 |