七年级数学上册计算题天天练 21.docx

1、七年级数学上册计算题天天练 21 4 1 ()()(6) 28(1)3(5) 7 7 9 1 1 ( )( ） 6(14)7(15) 8 4 7 1 (0.5)(50) (5)443 (1)1960 8 1 1 1 ()()0 11(1)2(3 8 5 6 1 1 4 ( )( ) 18(25)7(10) 6 7 5 1 1 ( )(70) (4)223 (1)1707 2 8 (-19)(-14) 3(-3) 1(-13.5) 1 1 ()() 12(-102) (-2)224 9 3 375(-7)(-6) 8.5(-2.5)(-2.8)4 2 1 1 3 4 8 ()() 9.6()(1

2、.9) 7 6 5 5 5 5 (5b7) y9(57b) 16m4(3b2t) (8mb)4(8b2b) 1 (148y)t 9(3b2ab6) 2 1 1 (ab)(pq) 2(7ay)8(n9q) 7 2 6x(9x6) 8x(7x2c)(9cx) 6(9a10)9a 10(5n4)(3n4) 3(ab7a)(7a4b) 11(abc7a)3(8a6abc) 8(xy9z)(xy5z) 5(pqpr)(7pqpr) 7 x 1 x 0.5x0.226.1x 9 2 9 4 1 5x7x 5(x8)9(x9)6 9 6 1 1 (2x4)x2 9x4(11x)8 9 5 y1 y3 8 5

3、x6.5(x6)45 3 6 1 2 (23x)(3x4) 2(6x3)15 8 9 6 2 ()()(10) 20(3)2(3) 7 7 2 1 10 ( )( ） 12(22)1(18) 3 4 9 1 (0.3)(200) (1)452 (1)1172 7 1 1 1 ()()0 18(1)3(5 8 4 7 1 9 6 ( )( ) 10(28)9(10) 6 8 7 1 1 ( )(40) (1)352 (1)1466 3 7 (-18)(-6) 13(-16) 4(-2.5) 1 1 ()() -2-3(-203) (-5)342 4 6 -516(-21)(-5) -10(-8.

4、4)(-1.6)8.1 2 1 1 2 1 2 ()() 1.6()(5.4) 5 9 9 5 5 5 (3m4) y3(35a) 8m3(4b2z) (7mb)9(4m4a) 5 (166y)z 8(9c6xy9) 4 1 1 (bc)(ef) 3(6ay)7(m7q) 6 3 9n(8n2) n(7n9c)(8c8n) 7(9a8)9a 8(6y4)(7y2) 5(ab9a)(8a8b) 12(abc2a)5(9a8abc) 9(xy7z)(xy3z) 2(pqpr)(6pqpr) 5 x 1 x 0.1x0.49.83.4x 3 6 9 4 1 6x7x 7(x5)2(x5)3 5 7 1 3 (8x5)x6 5x3(8x)6 7 5 y1 y2 5 0.5x6.5(x1)10 2 5 1 2 (52x)(4x1) 8(6x1)1 2 3