練習問題1(いろいろな計算)解答
()²…( )の右肩に2がつく場合は、()×()
-5を例で考えます。
? (-5)²=(-5)×(-5)
=+25
? -5²=-(5×5)
=-25
(1) 6²
=(6×6)
=36
(2) 2³
=(2×2×2)
=8
(3) 3⁴
=(3×3×3×3)
=81
(4) (-4)²
=(-4)×(-4)
=16
(5) -4²
=-(4×4)
=-16
(6) (-5)³
=(-5)×(-5)×(-5)
=-125
(7) (-2)²×(-5)
=(-2)×(-2)×(-5)
=-20
(8) (-3)×(-1)³
=(-3)×(-1)×(-1)×(-1)
=+3
(9) (-6²)÷(-3)²
=-(6×6)÷(-3)×(-3)
=-36÷9
=-36×1/9
=-4
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