1、206420 17 9 9 1 1 4.5 144 ( ) 8 5 8 3 6 9 7 1 1 ( ) 72198 8 6 2 10 365.5923 56.14.4 7 1 1 4 7 4 6 2 5 5 8 1 1 1 1 2 17 8 8 5 9 2 4 19 19 12 1 5 7 1 ( ) 36 7 6 6 6 2 42579929.7 74.147154 四、解方程。 17 x 0.8 5 0.04x 88 8 x 17 1 85% x x 48 8 8 6 1 1 x : 10 = : 6 : x = 0.8 : 60 2 6 8 5 = 0.3 : x = 0.075 : 7
2、 1.6 x 7 90 : 6 = x : 5 : x = 0.9 : 180 8 3 2 9 1 = = 5 x x 7 1 1 0.6 3 = : 6 = 3 2 2.6 x 1 1 1 : x 30 : x = 15 : 3 3 8 5 8733= 86090= 840= 39030= 122.6= 748= 0.40.1= 5270%= 13 1 1 9 1 3 1 = 5 = 6 6 2 8 6 4 3 6.090.73= 5.361.69= 258= 4004= 二、根据30722160,直接写出下面各题的得数。3000.72 30007.2 3072 0.3720 2160007
3、200 21607.2 2160007200 21600802202 598102 8698 35937 5063.51.2 904904 11 1 9 1 1 2.5 336 ( ) 5 5 8 6 7 9 8 1 1 ( ) 75698 8 7 4 8 26124.3 7.667 7 1 3 1 1 6 6 5 2 4 8 1 1 1 2 12 5 35 35 3 8 4 3 17 17 3 1 2 8 1 84 2 3 3 7 4 57.6966.09 4821222 x 0.1 6 4x 64 7 x 13 1 5% x x 49 3 7 7 9 = : 0.6 : x = 0.3 :
4、 4 8 16 6 = 5 : x = 1.25 : 9 3.6 x 1 0.7 : 7 = x : 0.8 : x = 90 : 6 1 8 2 1 2 x x 4 3 1 0.8 6 4 2 3 x x 0.8 : x = 0.4 : 6 2 9 8 6935= 930120= 840= 54060= 741.7= 736= 4.50.5= 2660%= 5 1 2 1 9 1 2 = 2 = = 3 3 7 5 8 4 3 6.452.49= 6.81.63= 58= 2703= 二、根据92585336,直接写出下面各题的得数。920580 92005.8 9.25800 9.20.0
5、58 5336005800 5336058 533600580 53365.8 899397 902396 7299 23757 224.94.6 53.40.853.40.8 5 9 2 1 1 9.5 126 3 5 3 6 7 4 6 1 1 ( ) 58402 3 5 4 8 256663.6 5577.6 6 3 1 1 1 5 5 4 8 2 5 1 1 1 2 2 3 5 5 3 9 4 3 5 5 23 2 1 7 2 54 19 3 3 6 3 54566268.8 74.133106 x 0.5 3 100x 106 3 x 9 1 65% x x 32 5 8 4 8 =
6、 : 20 : x = 0.5 : 5 5 6 6 4 1.2 x 5 9 = x : x = 0.6 : 1.8 1 6 6 1 2 x x 6 1 1 1.4 4 5 = 6 5 1 x x 3 : x = 1.5 : 4 2 6 5 987= 660410= 1820= 18020= 530.5= 923= 1.20.6= 1211 1 1 3 7 3 1 = 8 = 6 6 3 4 8 4 6 6.251.4= 5.632.86= 502= 3005= 二、根据60663960,直接写出下面各题的得数。600066 6006.6 6006600 600000.66 39.66600 3
7、9666 39.6660 3960006600 598197 797196 67402 45388 67.35.14.6 8.8698.869 5 6 4 1 1 6.5 96 ( ) 3 5 3 4 8 5 9 1 1 ( ) 80802 6 8 2 10 73.0637.8 510.68 6 1 5 1 4 7 2 6 4 5 1 1 1 1 1 2 44 44 3 8 2 3 3 3 3 3 1 5 3 48 2 4 4 6 4 1045950.1 64.847147 x 0.8 2 200x 50 6 x 7 1 90% x x 12 2 6 2 6 = : 8 : 2 7 6 8 = 0.4 : x = 0.1 :5.6 x 60 : 0.8 = x : 9 : x = 60 : 18 1 9 4 2 3 x x 3 1 1 2 3 7 = 5 8 0.6 x x 70 : x = 35 :2 8 9 8059= 65020= 1830= 330420.3= 828= 1.60.4= 5440%= 13 1 2 4 2 1 5 = 7 = 7 7 3 5 3 2 4 6.792.97= 6.611.75= 0.516= 3.66= 二、根据29351015,直接写出下面各题的得数。
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