97式18_4mm防暴弹.pdf

【精选问题 1】根式相加(1)2 75- 48 3 (2)3 2 +2 - 20+ 13 45 (3)3 2x- 12 8x +x 21x + x 3 (4) x 3y- xy 3 -x 2yx (x< 0) 【精选问题 2 】根式乘除(1)2 3×6 (2) 7÷ 14 (3)3 5÷ 12 (4)3 ab× 23 b (5)- 34 x×6 1x 2 (6) 12 xy÷( 72 1y ) 【精选问题 3 】分母有理化(1) 53 (2) 7 20 (3) 2x 9y (4) 642+ 10 (5) a-b a-b 【精选问题 4 】混合运算(1)( 2 -3)( 2 +5) (2)( 10 -23 )( 10 +23) (3)( 3-7) 2 (4) 45 + 15 -1 (5) 1 x+x 2 +2 - 1 x-x 2 +2 【测试训练】一、填空题 1. 计算: 23 × 6 =_________. 30× 1 15 =__________. 3 12 × 42 =_________. 2. 计算: 217 =__________. 12 26 =__________. 26 32 =__________. =__________. 3. 计算: 15 1000 - 10 25 =__________.(2 2-3 6)· 2 =___________. ( 15 +2 5)· 5 =__________. 4. 化简: 16+5 =__________. 22-3 =__________. 7+57-5 =__________. 5. 计算: 17÷ 3 25 × 35 = 2 23 ÷(- 23 34 )=__________. 6. 计算:( 8-2 12+ 18)× 16 =__________. (2 10- 18)÷22 =__________. 7. 计算: 34 16a + 13 9a = a9 + 52 4a =__________. 8. 计算: x2 4x+ 6x x9 - 2x 21x = 2xy - 2y 2xy 3 (y> 0)=__________. 9. 计算: 1b-a ·a 2- 2ab +b 2 =____________. 10. 解不等式:-6·(2x-3)>3x-2,知__________. 二、选择题 11. 下列等式成立的个数