1、609.2860 9 6 7 1 1 2.5 336 ( ) 5 5 8 7 6 8 8 1 1 ( ) 58698 7 7 4 8 91141350 64973 7 1 1 1 5 3 8 3 6 3 6 4 6 1 2 2 1 10 10 5 7 4 3 3 3 19 7 1 9 2 ( ) 72 17 8 8 8 3 274.42853.8 39.128175 四、解方程。 7 x 0.1 5 2x 84 3 x 11 1 45% x x 12 7 6 2 1 1 x : 9 = : 50 : x = 70 : 0.3 2 6 8 8 = 90 : x = 22.5 : 4 5.2 x
2、1 7 : 50 = x : 3 : x = 0.3 : 1.2 2 1 9 8 6 = = 5 x x 5 5 4 0.4 5 = : 4 = 6 5 2.8 x 1 1 1 : x 6 : x = 3 : 2 5 8 3 8025= 990100= 320= 16040= 890.8= 620= 6.30.9= 4420%= 15 6 1 1 3 1 1 = 8 = 7 7 5 2 4 5 5 5.22.56= 6.011.79= 52= 0.55= 二、根据86342924,直接写出下面各题的得数。8.63.4 8.63.4 86003.4 29.243.4 29243400 29240
3、034 29243400 598298 797201 49296 12143 3244.42.3 61.4861.48 15 7 9 1 1 1.5 96 ( ) 7 5 8 3 4 3 5 1 1 ( ) 35298 4 4 6 8 870.1872 85.40.06 7 4 1 1 1 6 5 7 3 5 1 8 1 4 5 6 27 27 4 9 3 5 11 11 26 7 1 7 1 24 19 8 8 6 2 40.04521.56 36.134238 x 0.1 7 20x 108 2 x 11 4 5% x x 25 2 5 5 6 = : 0.2 : x = 0.8 : 9
4、3 6 18 8 = 6 : x = 1.5 :6 x 4 50 : 60 = x : 40 : x = 6 : 1.5 5 1 9 5 2 3 x x 3 3 7 1.8 7 2 = 2 6 2.6 x x 0.5 : x = 0.25 :2 7 8 7914= 810230= 250= 320652.4= 538= 6.30.9= 2870%= 7 1 1 3 3 1 1 = 9 = 4 4 2 4 4 5 3 5.472.25= 5.640.26= 0.52= 560二、根据27431161,直接写出下面各题的得数。27004300 274.3 27043 0.0274.3 116100
5、.43 1161004.3 116.1430 116100797298 59698 76401 28239 2255.42.7 5110.45110.4 8 9 8 1 1 4.5 448 7 5 7 8 8 6 4 1 1 ( ) 17602 7 3 4 10 16.436.52 11.159 4 1 5 1 1 9 5 4 6 8 2 1 7 1 4 1 4 31 31 4 8 3 5 5 5 25 1 7 6 1 20 19 8 8 5 2 324453.77 23.346171 8 x 0.6 2 0.2x 20 x 17 1 80% x x 16 4 8 2 8 = : 4 : x
6、= 0.6 : 80 3 8 6 8 = 8 : x = 2 : 6 4.8 x 6 : 30 = x : 9 : x = 0.9 : 180 1 2 8 5 7 x x 4 4 9 1.8 2 5 8 2.8 x x 60 : x = 30 :5 9 3 938= 680100= 430= 160502.2= 815= 6.30.9= 5250%= 7 5 1 4 1 1 1 = 7 = 6 6 2 3 4 2 7 5.370.37= 5.872.51= 12.532= 186= 二、根据46602760,直接写出下面各题的得数。466000 466 46000.6 460060 27600
7、60 276000.6 276006 697101 699301 64198 34948 66.92.91.2 6.980.026.980.02 11 9 3 1 1 4.5 196 ( ) 5 5 4 7 7 7 5 1 1 ( ) 57899 8 4 2 10 889.861.3 6940.31 7 1 1 7 1 6 6 5 2 8 2 1 1 3 1 1 10 2 7 4 3 11 11 19 1 1 5 1 36 17 2 2 6 3 11.2515286 21.246140 x 0.8 5 40x 92 50% x x 30 4 5 6 9 : x = 0.4 : 0.4 18 7 = 0.4 : x = 0.1 :2.4 x 30 : 0.5 = x : 4 : 1.8 2 4 7 1 5 x x 2 1 1 0.4 5 9 = 4 2 2.4 x x 40 : x = 20 :5 8 2 6546= 87040= 510= 35070= 172.4= 838= 4.50.5= 3240%= 17 1 4 1 1 1 9 = 9 = 8 8 7 6 6 8 8 6.561.5= 5.952.37= 12532= 100二、根据51834233,直接写出下面各题的得数。
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