1、5266 526600 5206.6 520.066 343200660 3432006600 34.320.66 343.26.6 三、估算。603397 801198 66398 62888 四、计算。96.32.91.9 21.64021.640 7 1 4 1 1 8.5 27 ( ) 3 5 3 3 3 3 4 1 1 ( ) 33598 4 3 6 8 60.968010 0.333.5 6 1 1 7 1 2 7 5 7 8 5 2 1 2 1 12 5 30 30 3 9 3 4 17 17 5 1 4 8 1 ( ) 28 3 5 5 7 2 1960562360 27.83
2、3238 四、解方程。 9 x 0.4 3 100x 38 8 x 9 1 80% x x 10 2 5 2 1 1 x : 4 = : 9 : x = 40 : 50 5 7 16 9 = 30 : x = 7.5 : 6 4.8 x 6 0.4 : 0.9 = x : 0.8 : x = 30 : 1.5 7 1 5 5 6 = = 2 x x 5 1 9 2 2 = : 4 = 6 8 2 x 1 1 1 : x 8 : x = 4 : 4 3 6 6 9859= 860370= 620= 28070= 242.4= 743= 2.40.4= 3217 7 1 7 1 5 3 = 1 =
3、 = 8 8 2 8 7 4 2 6.450.14= 6.510.98= 1.2564= 602= 二、根据6714938,直接写出下面各题的得数。6.714 6701400 0.06714 9380140 93814 9.381400 93800140 597203 903197 56203 12458 24.14.82.1 9.6659.665 3 3 7 1 1 9.5 192 ( ) 2 5 6 8 4 6 9 1 1 ( ) 21801 7 8 2 10 58.559100 76370 5 1 1 1 3 5 6 4 6 3 4 1 1 1 1 2 5 37 37 2 8 2 3 7 7 36 6 1 6 2 63 19 7 7 7 3 9.2537300 32.242179 7 x 0.1 4 4x 58 3 45% x x 15 3 5 3 8 = : 0.8 : x = 5 : 0.4 2 6 6 5 = 4 : x = 1 :1.6 x 1 60 : 50 = x : 0.9 : x = 0.3 : 12 4 1 4 8 1 2 x x 2 5 5 0.6 6 8 = 6 4 1.2 x x 0.5 : x = 0.25 : 5 3 6 5 709= 780120= 1110= 56040= 840.2= 833= 2.80.4= 5220%= 8 1 3