2020-2021学年苏科版七年级数学下册《第8章幂的运算》期中复习易错题型突破训练

1、3 2 92 3 52 3 63 1 6 66 73 3 3 3 3 52 3 5 3 3 2 92 3 52 3 63 1 6 66 73 3 3 3 3 52 3 5 3 0 7 3 43 43 14 20 t 2a b a x 4 2 44 2a 2 6 b 2 20192020m n 3 +2n12021 年苏版年数下册第 8 章的算中习错型破（附答） A 4C ） a B a aDa aABCD 0.3 A0.310B0.310C3D3 AxB9xC9xD27x 10A B D 1 x + 2x 1A1 B2 C3 D AB CD Aa +aBa C D a 10 t1 t x 3x

2、 12 3 36 13 a +a +2 14 5 4 4 4 + 15 16 2 3 +2+2+2a b 2m n 2 3 yx x x 3 3m m+2+2+2a b 2m n 2 3 yx x x 3 3m m 2 3 m n 2 m 2n1m nx x 5x +2 3a b c a b c 5 5 5 17 2 m2 m 18 2 b 19 4 16 2 20 21 320 22 5 6 5 3 230 0.000005 12 50 24 39 3 m 25 y19 x2 3 x y26 a a0 a1m mn 1 2 8 16 2 3 5 15 x 271 2 62 ac 2 4 12

3、 8 bc 3 b 3c 72 bc 7 77 7 202020207 77 7 20202020n n 1928 0.250.25 1 0.125 12 24 16 3 2 62 3 52 3 6 3 1 6 63 3 2 62 3 52 3 6 3 1 6 63 3 52 3 6 3 3 0 3 43 4 73 14 0 t 2 4 B a CaD a a a b 10 110610D 27x 10 A x + 2x 3.14 2 1 a A a a B a a C D 2 110 t1 1 t1 t1 t4 t1 t 2abx 2x x 4 32 4 8 88 a 2abx 2x x 4

4、 32 4 8 88 a 2b a bc2 20204201920192019m n 3 +2n1 m nm n 1 m1 2 m1m t4 x 123 3 36 3 3 213 a 2 a +a +4a 6 14 5 4 45 4 4a3c aca +ab+3ca+3c3c3 1520194 0.25 0.2510.25 0.2516 9 533 3 3 9 3 17 +2 +2 2 2 2 2 m+11 m0a b 2b a 22 n 2 2 20a b 2b a 22 n 2 2 20 3x x x x x x x x x x x x 3 33 3x x +1 3 3x 3 27 7 m

5、 m2 3 1+2m 2 3 3 2 m 6 m 6 2m 2n n18 2 2 2 baa19 2 2 2 202.65710 20005.31421 3xy30 x23 2 2 2 822 5x5 6 56 56 665 30 630 10 6 5 6 10 30 x323 0.0000055 2 x 0.000005 x110 1 249 27 3 3 1+2+3 m4 m m 4 4 16 25 y 3 x2 2nx x x 3 x 2 2nx x x 3 x 1+4 5x +2x x x8a c a+cb b+ bb c cb 2a3 2 3 b3 5 3 5 3 5 2 3 220202020n n 192 n 122 12y1x312y2xy24xy2+12627 3 3 3 3x328 16 2 22 2 2 1x+4x5x433 35 xx8x527 2 336 2 6362 2 +