1、96012 9.61200 960120 0.961200 11.52120 11520012 115.20.12 11.5212 三、估算。903203 897201 66301 31742 四、计算。61.65.23.6 24200.0924200.09 15 6 5 1 1 1.5 144 ( ) 7 5 4 6 6 8 4 1 1 ( ) 65698 7 3 2 10 2798517 21417 7 1 4 2 1 7 6 2 5 3 3 1 1 1 1 4 15 9 9 2 10 4 2 19 19 14 1 1 6 1 ( ) 28 11 2 2 7 2 40.424752.2 5
2、9.827200 四、解方程。 3 x 0.2 6 500x 114 2 x 15 1 85% x x 24 8 8 3 1 1 x : 4 = : 0.8 : x = 6 : 90 4 8 16 9 = 2 : x = 0.5 : 4 1.2 x 5 0.5 : 10 = x : 0.7 : x = 0.3 : 1.2 6 1 8 7 1 = = 2 x x 3 1 1 0.4 9 = : 3 = 3 6 1.4 x 1 1 1 : x 0.4 : x = 0.2 : 5 4 8 8 7124= 610540= 1520= 320720.7= 328= 3.60.9= 2810%= 7 1
3、1 1 3 1 2 = 2 = = 4 4 2 8 2 2 3 6.111.56= 5.751.78= 0.564= 490二、根据95565320,直接写出下面各题的得数。95056 0.955600 0.950.056 5320000.56 5325.6 53.2560 5320005600 599201 90497 73401 17761 26004.91.7 80.3280.32 6 8 7 1 1 7.5 ( ) 5 5 6 3 8 7 9 1 1 ( ) 62399 8 8 2 6 619.45710 340.13 7 1 1 1 1 3 8 4 7 2 5 1 1 2 1 5 2
4、 25 25 3 7 3 5 7 7 4 1 2 7 2 ( ) 18 3 3 3 6 3 230255020 23.739236 17 x 0.1 7 0.1x 72 8 x 13 1 60% x x 49 7 7 7 6 = : 0.3 : x = 2 : 3 7 18 5 = 90 : x = 22.5 : 6 4.4 x 1 0.9 : 60 = x : 6 : x = 90 : 180 7 1 7 4 1 2 x x 2 1 7 1 3 4 = 4 8 0.8 x x 90 : x = 45 : 2 2 7 7 9926= 680180= 1730= 16020= 461.3= 450= 2.40.3= 4425%=