# 数学演習/中学校1年生/正負の数

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## 正負の数

${\displaystyle -4,0,5,-{\frac {3}{4}},4.3}$
(1)正の数でも負の数でもない数を選びなさい。
(2)自然数を選びなさい。
(3)絶対値が小さい順に並べかえなさい。
(4)不等号を用いて、小さい順に並べかえなさい。

## 加法・減法

1. ${\displaystyle -9+2}$
2. ${\displaystyle 2-(-9)}$
3. ${\displaystyle 3-14}$
4. ${\displaystyle -8-9}$
5. ${\displaystyle 36-55}$
6. ${\displaystyle -(-36)+11}$

## 乗法・除法

1. ${\displaystyle -8\times (-2)}$
2. ${\displaystyle -2\times 3}$
3. ${\displaystyle 6\times (-3)}$
4. ${\displaystyle 81\div (-9)}$
5. ${\displaystyle -77\div 11}$
6. ${\displaystyle -24\div (-4)}$
7. ${\displaystyle -1}$${\displaystyle 3}$
8. ${\displaystyle (-3)}$${\displaystyle 3}$
9. ${\displaystyle -6}$${\displaystyle 2}$
10. ${\displaystyle (-2)}$${\displaystyle 2}$

## 四則混合

1. ${\displaystyle -2+6\div 3}$
2. ${\displaystyle -9-4\times 5}$
3. ${\displaystyle (-9+6)\times 2}$
4. ${\displaystyle -2}$${\displaystyle 4}$${\displaystyle -8+(-2)}$
5. ${\displaystyle 5}$${\displaystyle 2}$${\displaystyle \div 5+5}$
6. ${\displaystyle (-5}$${\displaystyle 2}$${\displaystyle +5\times 3)\div 2}$
7. ${\displaystyle 24\div {(5-8)\times (3-4)}}$
8. ${\displaystyle -(-4+9)}$${\displaystyle 2}$
9. ${\displaystyle -}${${\displaystyle -(6-8)}$}${\displaystyle 2}$
10. ${\displaystyle -[}${${\displaystyle 2-(-3)+(-4)}$}${\displaystyle \times {-2+(-5)}\times 3]}$