下列运算正确的是 ( )
a 2 + a 3 = a 5
a 2 · a 3 = a 6
( 2 a ) 3 = 8 a 3
a 3 ÷ a = a 3
A. 6 a - 5 a = 1 B. a 2 · a 3 = a 5 C. ( - 2 a ) 2 = - 4 a 2 D. a 6 ÷ a 2 = a 3
下列计算,正确的是 ( )
A. a 5 + a 5 = a 10 B. a 3 ÷ a − 1 = a 2
C. a ⋅ 2 a 2 = 2 a 4 D. ( − a 2 ) 3 = − a 6
A. a 3 × a 2 = a 6 B. a 3 ÷ a = a 3
C. a 2 + a 2 = a 4 D. ( a 2 ) 2 = a 4
a 3 · a 3 = a 9
a 6 ÷ a 3 = a 2
a 3 + a 3 = 2 a 6
( a 2 ) 3 = a 6
m 2 + 2 m = 3 m 3
m 4 ÷ m 2 = m 2
m 2 · m 3 = m 6
( m 2 ) 3 = m 5
A. 3 x 2 + 4 x 2 = 7 x 4 B. 2 x 3 ⋅ 3 x 3 = 6 x 3
C. a ÷ a − 2 = a 3 D. ( − 1 2 a 2 b ) 3 = − 1 6 a 6 b 3
)下列运算正确的是 ( )
( a 2 ) 3 = a 5
( 2 a ) 2 = 2 a 2
a 3 ÷ a 2 = a
下列各式中,计算结果为 m 6 的是 ( )
m 2 · m 3
m 3 + m 3
m 12 ÷ m 2
( m 2 ) 3
下列计算正确的是 ( )
A. a 2 · a 3 = a 6 B. a 3 ÷ a = a 3
C. a − ( b − a ) = 2 a − b D. ( − 1 2 a ) 3 = − 1 6 a 3
下列计算错误的是 ( )
A. ( 1 2 ) − 2 = 4 B. 3 2 × 3 − 1 = 3
C. 2 0 ÷ 2 − 2 = 1 4 D. ( − 3 × 10 2 ) 3 = − 2 . 7 × 10 7
m 8 ÷ m 4 = m 2
3 m + 2 n = 5 mn
( m 3 ) 2 = m 6
( a 2 b ) 2 = a 4 b 2
A. 2 x 2 − x 2 = 1 B. x 6 ÷ x 3 = x 2
C. 4 x · x 4 = 4 x 5 D. ( 3 x y 2 ) 2 = 6 x 2 y 4
计算 t 3 ÷ t 2 的结果是 ( )
t 2
t
t 3
t 5