1、3.526 3526 350026 0.352600 912.6 910.26 91002.6 9102.6 三、估算。699101 496299 62396 53688 四、计算。4412.84.8 624020624020 11 9 2 1 1 7.5 60 ( ) 5 5 3 4 5 7 7 1 1 ( ) 20199 6 6 6 10 15.05184 51.263 4 1 1 5 1 6 5 2 7 6 3 1 5 1 2 1 12 18 18 2 6 4 3 13 13 3 7 1 6 1 ( ) 15 2 8 8 5 3 429.3539.75 24.538137 四、解方程。
2、6 x 0.6 8 2x 118 5 x 5 1 90% x x 8 2 4 2 1 1 x : 7 = : 0.8 : x = 0.5 : 4 3 9 8 4 = 80 : x = 20 : 5 3.6 x 6 50 : 10 = x : 5 : x = 3 : 1.5 5 1 2 5 2 = = 5 x x 3 8 7 0.4 4 = : 3 = 7 6 2.4 x 1 1 1 : x 60 : x = 30 : 2 5 6 3 9430= 650180= 1410= 30030= 820.6= 449= 3.50.5= 5090%= 5 3 4 1 2 1 2 = 6 = 4 4 7 6
3、 3 8 3 6.162.69= 5.732.22= 12.54= 147= 二、根据81181458,直接写出下面各题的得数。8.11.8 0.811.8 811800 8.118 14.58180 14580018 1458001.8 145.80.18 901403 804396 57304 71781 25102.22.8 8.23808.2380 6 6 8 1 1 1.5 252 ( ) 5 5 7 6 6 6 8 1 1 ( ) 76598 5 7 4 8 16454.91 6.960.5 5 1 8 6 3 9 6 2 7 7 4 3 9 3 2 1 2 24 24 4 10
4、4 3 3 3 21 1 5 7 1 24 11 6 6 6 2 45.59475.35 70.533185 9 x 0.3 4 200x 74 8 x 3 6 75% x x 14 4 2 7 5 = : 8 : 100 3 8 18 3 = 0.5 : x = 0.125 : 9 1.6 x 1 70 : 90 = x : 60 : x = 0.9 : 15 2 2 9 9 1 7 x x 2 5 7 1.4 9 5 = 6 8 2.4 x x 3 : x = 1.5 : 8 5 9 3 7732= 860510= 530= 120672.6= 212= 2.40.8= 407 1 1 1