練習問題1(正の数・負の数乗法・除法3)解答
(1) 8×(-3)÷2
=(-24)×1/2
=-12
(2) (-6)²÷(-2)⁴×(-8)
=(-6)×(-6)×(-1/2)×(-1/2)×(-1/2)×(-1/2)×(-8)
=36×1/16×(-8)
=36×(-1/2)
=-18
(3) 2/3÷(-8/9)÷0.3
=2/3×(-9/8)÷3/10
=2/3×(-9/8)×10/3
=2×(-9)×10/3×8×3
=-5/2
練習問題1(正の数・負の数乗法・除法3)解答
(1) 8×(-3)÷2
=(-24)×1/2
=-12
(2) (-6)²÷(-2)⁴×(-8)
=(-6)×(-6)×(-1/2)×(-1/2)×(-1/2)×(-1/2)×(-8)
=36×1/16×(-8)
=36×(-1/2)
=-18
(3) 2/3÷(-8/9)÷0.3
=2/3×(-9/8)÷3/10
=2/3×(-9/8)×10/3
=2×(-9)×10/3×8×3
=-5/2
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