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２ x − )52(4 x −− )52(4 １

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無料学習プリント  スタディーX  http://www.study-x.com/

数学  中 1  文字の式  分配法則        氏名 

１次の計算をしなさい。 

(1)  4(2x−5) (2)  −4(2x−5)

(3)  (6 9) 3

1 x− (4)  (−10y+15)÷5

(5)  (4x−10)÷2 (6) 

6 ) 5 20 10

( x− ÷

２次の計算をしなさい。 

(1)  18

3 7 2x− ×

(2)  ⎟

⎠

⎜ ⎞

⎝

⎛ − 6

2 12 3x

(3)  4

2 ) 3

16

( − −

×

− x

(4)  ⎟

⎠

⎜ ⎞

⎝

− ⎛ + 10 20 x 7

(2)

無料学習プリント  スタディーX  http://www.study-x.com/

【解答】

１ 

(1) 8x−20 (2) −8x＋20

(3) 2x−3 (4) −2y＋3 (5) 2x−5 (6) 12x−24 ２

(1) 12x−42 (2) 6x−4 (3) 12x＋8 (4) −2x−14

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