1、7.450.07 13 1 5 1 1 4.5 64 ( ) 6 5 4 4 4 6 4 1 1 ( ) 99401 5 3 6 6 69.95940 1.80.42 9 1 7 1 1 4 8 3 6 5 3 1 1 1 1 2 1 21 21 2 8 4 5 3 3 13 1 1 6 2 ( ) 63 11 2 2 7 3 5100683.3 9141106 四、解方程。 17 x 0.8 9 0.16x 68 8 x 5 1 55% x x 14 3 2 7 1 1 x : 7 = : 0.5 : x = 40 : 9 2 8 8 3 = 30 : x = 7.5 : 5 4 x 3 8
2、0 : 30 = x : 9 : x = 60 : 15 2 3 4 8 6 = = 5 x x 5 7 9 0.6 7 = : 3 = 8 8 2.6 x 1 1 1 : x 7 : x = 3.5 : 2 2 9 2 8023= 860480= 850= 9030= 850.8= 622= 4.50.9= 5860%= 7 1 1 1 3 1 1 = 9 = 4 4 2 2 2 6 5 6.032.9= 6.091.5= 0.1252= 30二、根据39993861,直接写出下面各题的得数。0.399900 390099 3.99900 390990 386199 38.610.99 38
3、610099 386.199 799403 90399 94304 29762 50201.15.4 7000.037000.03 7 2 8 1 1 3.5 63 ( ) 6 5 7 3 3 3 7 1 1 ( ) 36201 4 6 6 6 951.571.1 3564 4 3 6 1 1 7 5 4 7 2 2 1 8 1 1 5 6 47 47 3 9 2 5 11 11 3 1 7 7 1 ( ) 12 2 8 8 6 2 100191951 53.825136 6 x 0.4 9 1.6x 12 5 x 15 2 90% x x 24 4 8 3 0.2 : x = 0.4 : 1
4、0 5 9 18 6 = 0.6 : x = 0.15 : 6 0.8 x 6 0.6 : 40 = x : 5 : x = 9 : 150 5 2 5 5 4 5 x x 3 7 2 1.2 6 6 = 6 3 2.4 x x 20 : x = 10 : 8 5 6 6 7112= 970520= 5421.1= 239= 5.40.6= 5690%= 5 1 2 1 4 1 1 = 5 = = 4 4 5 4 3 6 3 6.730.81= 6.782.58= 0.1254= 5.46= 二、根据29812349,直接写出下面各题的得数。2.90.81 298.1 29081 2.981
5、2349008100 23498.1 23490601199 798298 93297 31943 5764.64.2 50500.950500.9 15 4 2 1 1 6.5 36 ( ) 7 5 3 3 4 2 5 1 1 ( ) 773 4 6 10 77.79798 5.540.72 6 1 7 1 1 8 5 3 8 8 6 1 1 1 3 10 1 22 22 2 10 2 4 11 11 19 1 1 9 3 96 13 2 2 8 4 1470989.96 45.12070 x 0.6 2 200x 72 4 x 9 1 55% x x 15 5 5 3 6 = : 9 :
6、x = 0.9 : 1 3 6 10 7 = 50 : x = 12.5 : 4 5.2 x 1 50 : 0.9 = x : 80 : x = 0.6 : 12 4 8 6 5 7 x x 6 3 5 1.8 6 9 = 4 4 0.8 x x 50 : x = 25 :2 9 4 9351= 860330= 1940= 25050= 832.4= 726= 1.40.7= 3040%= 9 4 4 6 1 5 1 = 4 = 5 5 5 7 7 4 4 5.430.54= 6.750.24= 0.532= 124= 二、根据43572451,直接写出下面各题的得数。4357 0.43570
7、0 4300570 43000570 24.510.57 245105.7 24510.57 2451000.57 902403 801197 74302 14629 71.32.24.5 3320.053320.05 11 3 2 1 1 0.5 126 6 5 3 7 6 7 5 1 1 ( ) 77698 6 4 6 10 924.984.4 8188.7 7 1 1 1 1 2 8 2 5 8 2 3 1 1 4 3 8 32 32 4 6 2 5 11 11 3 1 2 6 1 40 2 3 3 5 4 71.4215750 42.834154 0.6 6 20x 68 7 x 3 1 35% x x 12 8 2 6 40 : x = 20 : 3 9 4 7 = 60 : x = 15 : 3 1.6 x 4 0.1 : 0.2 = x : 4 : x = 30 : 1.8 4 4 3 1 5 x x 2 1 7 0.6 3 x 2 : x = 1 : 7 2 9 7 8734= 830230= 1120= 270901.1= 518= 0.80.8= 5470%= 11 4 1 1 1 6 1 = 9 = 5 5 3 2 8 7 2 6.390.99= 6.812.13= 532= 27二、根据1123253,直接写出下面各题的得数。
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