1、65302 13 6 2 1 1 2.5 72 ( ) 7 5 3 6 4 4 7 1 1 ( ) 75602 5 6 6 8 886.794 73.570 6 1 7 1 1 9 7 3 8 7 2 1 1 1 2 5 2 46 46 5 10 3 3 7 7 32 1 2 6 1 ( ) 30 17 3 3 5 2 34.2957040 69.132174 四、解方程。 9 x 0.8 7 80x 96 5 x 3 2 30% x x 6 9 2 3 1 1 x : 8 = : 8 : x = 2 : 6 4 8 8 5 = 30 : x = 7.5 : 4 5.2 x 4 9 : 50
2、= x : 20 : x = 60 : 150 5 2 8 8 1 = = 3 x x 6 3 6 1.6 6 = : 8 = 4 5 2 x 1 1 1 : x 20 : x = 10 : 3 5 6 4 9831= 85080= 1420= 550421.9= 825= 0.40.2= 6090%= 3 1 5 5 1 5 7 = 6 = = 2 2 7 6 2 4 8 6.471.49= 5.21.43= 12516= 44= 二、根据4021840,直接写出下面各题的得数。4002.1 402.1 40021 40000.21 84210 84000210 8421 842100 69
3、7103 902101 72397 14274 6482.12.6 1.1151.115 15 2 4 1 1 4.5 54 ( ) 7 5 3 6 3 6 5 1 1 ( ) 26802 7 4 2 6 33555350 2.451.7 5 2 1 2 7 2 6 3 7 3 8 1 1 3 1 5 8 36 36 3 8 4 2 13 13 6 1 3 9 1 ( ) 16 5 4 4 8 2 136876508 23.321156 11 x 0.7 3 800x 114 6 x 9 5 60% x x 24 7 4 6 10 = : 0.3 : 0.7 5 6 4 3 = 70 : x
4、= 17.5 :0.8 x 1 2 : 0.2 = x : 40 : x = 3 : 15 2 5 9 4 5 x x 3 1 2 0.6 7 6 3 0.6 x x 5 : x = 2.5 : 5 4 8 3 9216= 610300= 1730= 12020= 271.3= 916= 0.90.3= 449 1 1 7 1 7 7 = 7 = 4 4 2 8 8 8 6 5.090.15= 6.231.21= 2.58= 55= 24960,直接写出下面各题的得数。42400 4024 0.42400 4000240 96000.24 9.6240 9.624 9602400 599301
5、 699396 93399 36389 99.52.11.2 520.02520.02 3 1 6 1 1 0.5 126 ( ) 2 5 7 6 3 8 9 1 1 ( ) 95198 7 8 2 6 67.7292.5 1.356.8 7 4 1 1 5 8 5 2 2 6 1 1 1 4 7 6 9 9 4 7 4 5 13 13 20 1 1 8 1 28 17 2 2 7 2 27.2831135 60.646106 x 0.6 3 200x 30 8 x 5 1 70% x x 4 9 2 2 3 = : 0.5 : x = 50 : 70 3 8 12 6 = 5 : x = 1
6、.25 :4 x 60 : 9 = x : 7 : x = 0.9 : 1.5 4 6 8 7 5 x x 6 1 6 2 7 9 = 4 7 2 x x 9 : x = 4.5 : 2 5 6 9 6133= 87010= 650= 36030= 873= 834= 0.30.1= 4015 1 2 7 1 3 7 = 2 = 7 7 3 8 5 2 8 6.072.57= 6.610.79= 12564= 3.5二、根据96938928,直接写出下面各题的得数。9600930 0.9693 9.69300 960093000 892.893 892.893 892800930 892800
7、.93 702201 803101 66204 23627 95802.12.3 330.2330.2 3 3 5 1 1 2.5 192 2 5 4 8 6 6 8 1 1 ( ) 85401 7 7 6 10 839.89950 3.917.4 5 1 1 7 1 6 4 5 8 6 1 1 1 1 18 1 15 15 5 10 4 5 19 19 14 5 1 9 1 48 11 6 6 8 2 99.93741.6 30.240216 0.5 8 8x 30 4 x 9 1 30% x x 20 3 4 5 5 = : 90 : x = 0.2 : 0.9 5 7 16 8 2.4 x 7 8 : 60 = x : 8 : 180 6 1 9 4 1 2 x x 8 7 1 1.6 6 3 = 8 3 0.4 x x 0.8 : x = 0.4 : 8 4 6 6 6946= 96030= 1740= 80382= 613= 4.90.7= 305 2 1 1 1 8 1 = 2 = 3 3 3 2 2 7 2 5.931.35= 6.132.49= 258= 20二、根据85917735,直接写出下面各题的得数。
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