1、278080 13 3 8 1 1 0.5 224 ( ) 7 5 7 4 8 5 4 1 1 ( ) 76701 6 3 2 10 104.853.4 4.576.4 9 1 1 1 3 3 8 4 3 4 4 1 1 1 1 1 10 17 17 2 10 2 2 11 11 12 1 6 5 1 ( ) 24 7 7 7 6 4 8.6867130 28.136207 四、解方程。 15 x 0.8 9 0.8x 70 8 x 5 1 70% x x 12 6 3 4 1 1 x : 9 = : 60 : x = 40 : 1 5 9 14 5 = 3 : x = 0.75 : 2 4
2、x 4 1 : 0.9 = x : 0.3 : x = 0.9 : 180 3 4 4 8 4 = = 5 x x 3 2 8 0.6 3 = : 4 = 3 7 0.6 x 1 1 1 : x 80 : 4 5 7 5 8028= 83080= 320= 70070= 891.6= 749= 5.40.9= 3290%= 3 1 2 1 3 5 6 = 8 = 2 2 3 2 4 4 7 6.862.46= 5.930.15= 12532= 3.93= 二、根据62372294,直接写出下面各题的得数。62037 620370 620370 6.23700 2294037 2294037 2
3、2.943.7 229400370 902401 697202 77397 15234 6231.44.3 93999399 11 4 2 1 1 1.5 60 ( ) 5 5 3 4 5 3 9 1 1 ( ) 60901 4 8 4 8 69.644830 0.150.07 7 1 1 1 1 5 6 5 8 5 6 1 1 1 1 2 5 4 4 4 9 4 5 7 7 12 1 6 8 1 ( ) 63 7 7 7 7 3 25.550731 732092 9 x 0.2 7 800x 38 x 9 5 15% x x 48 6 8 6 5 = : 30 : x = 100 : 9 5
4、 6 12 7 = 0.2 : x = 0.05 : 3 1.2 x 1 90 : 0.7 = x : 0.5 : x = 3 : 15 8 1 7 3 1 3 x x 2 2 3 1.6 9 3 = 3 4 0.6 x x 0.5 : x = 0.25 : 5 4 9 5 8528= 940140= 850= 12020= 510.2= 233= 0.50.1= 1840%= 15 1 1 1 4 3 5 = 4 = = 7 7 3 7 5 2 4 5.311.19= 51.44= 0.2532= 1.62= 二、根据70926440,直接写出下面各题的得数。70092 7009200 0.
5、792 700000.92 6449.2 644000.92 64.40.92 644798297 897397 57101 48264 46604.33.6 19.20.419.20.4 3 2 3 1 1 9.5 160 2 5 4 8 5 5 8 1 1 ( ) 44599 6 7 4 8 931411 3.952 7 3 1 1 2 7 8 4 8 4 3 1 1 1 1 7 10 8 8 4 8 2 4 17 17 13 1 6 9 1 64 7 7 7 8 4 76509029.5 41.824124 17 0.7 7 4000x 72 x 4 1 20% x x 18 3 3 6
6、 9 : x = 5 : 0.5 10 6 = 0.9 : x = 0.225 :1.6 x 10 : 0.1 = x : 3 : 1.8 4 2 7 1 5 x x 6 9 1 1.4 4 6 = 8 4 1 x x 30 : x = 15 :2 8 9 8948= 890520= 1140= 7010= 831.7= 226= 0.60.3= 4820%= 8 6 6 1 1 1 5 = 6 = 7 7 7 7 2 2 4 6.050.12= 52.32= 52= 16二、根据94999306,直接写出下面各题的得数。0.949900 0.94990 940.99 93.06990 930
7、6099 930699 930.6990 59897 698398 62399 56171 9572.91.6 8592085920 5 2 6 1 1 180 ( ) 3 5 5 6 6 6 7 1 1 ( ) 377 6 4 6 70445.99 2505.7 9 3 9 7 1 8 4 8 8 2 2 5 1 1 1 2 47 47 3 6 2 5 3 3 20 1 7 7 1 11 8 8 6 2 83.52876.17 93.438230 11 0.3 5 0.5x 104 6 x 9 4 10% x x 40 4 8 5 8 : x = 0.2 : 7 3 8 4 6 = 70 : x = 17.5 :2.4 x 5 7 : 4 = x : 4 : x = 30 : 6 1 2 5 2 7 x x 3 1 1 1.6 6 4 2 2 x x 0.9 : x = 0.45 : 8 5 7 9 8224= 630350= 1630= 240342.8= 210= 0.30.1= 525%= 13 1 2 1 1 5 1 = 4 = 7 7 7 2 4 6 7 5.830.68= 5.551.41= 0.564= 120二、根据34551870,直接写出下面各题的得数。
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