中1数学 正負の数の計算(四則演算まとめ)

1次の計算をしなさい。

( (1) ) ( 1 - 3 )

( (2) ) ( 5 - (-8) + 3 )

( (3) ) ( (-12) - (-25) - (-18) )

( (4) ) ( 2 \times (-3) + 5 )

( (5) ) ( (-8) \times (-7) + 4 \times (-2) )

( (6) ) ( (-5) \times (-5) + 5 \times (-5) )

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1

( (1) ) ( -2 )

( (2) ) ( 16 )

( (3) ) ( 31 )

( (4) ) ( -1 )

( (5) ) ( 48 )

( (6) ) ( 0 )

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2次の計算をしなさい。

( (1) ) ( 8 \div (-2) )

( (2) ) ( (-9) \div 3 + 7 )

( (3) ) ( 3 \times (1 - 5) )

( (4) ) ( (2 - 8) \div (-2) )

( (5) ) ( (3 - 4) \times (4 - 6) )

( (6) ) ( (1 - 10) \div (-3) + 2 \times (-3) )

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2

( (1) ) ( -4 )

( (2) ) ( 4 )

( (3) ) ( -12 )

( (4) ) ( 3 )

( (5) ) ( 2 )

( (6) ) ( -3 )

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3次の計算をしなさい。

( (1) ) ( (-2)^3 + 6 )

( (2) ) ( 4^2 - (-3)^3 )

( (3) ) ( (1 - 8)^2 )

( (4) ) ( -3^2 + 12 )

( (5) ) ( -2^3 - 3^2 )

( (6) ) ( -2 \times (2 - 5)^2 )

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3

( (1) ) ( -2 )

( (2) ) ( 43 )

( (3) ) ( 49 )

( (4) ) ( 3 )

( (5) ) ( -17 )

( (6) ) ( -18 )

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4次の計算をしなさい。

( (1) ) ( -10 \times (1.2 - 1.7) )

( (2) ) ( 2.4 \div (-0.6) - 3^2 )

( (3) ) ( (3.14 - 6.28) \times (-3) )

( (4) ) ( \dfrac{2}{3} \times (2 - 5) )

( (5) ) ( \left( -\dfrac{2}{3} \right)^{2} + \dfrac{1}{3} )

( (6) ) ( -\left( \dfrac{1}{2} \right)^{3} + \dfrac{3}{8} )

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4

( (1) ) ( 5 )

( (2) ) ( -13 )

( (3) ) ( 9.42 )

( (4) ) ( -2 )

( (5) ) ( \dfrac{7}{9} )

( (6) ) ( \dfrac{1}{4} )

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