1、百分数百分数专项专项计算题计算题 计算: 20 (1-20%) 20 (1-25%) 20 (1+20%) 20 (1+25%) 60 (30%-25%) 120 (1-25%-40%) (4 8-12) 50% (48 60%) 10 63 (1 7) 30% 0.75 0.25 25% 分数(百分数)计算题 一、直接写得数:一、直接写得数: 8 5 50% 50% 60% % 6 5 1 1 7 2 6 5 5 5 7 4 7 3 9 7 3 2 8 5 4 1 9 5 10 3 6 5 3 1 7 3 14 9 2 1 3 1 6 5 2 1 9 5 90% 90% 8 5 12.5%
2、48%12.5% 48% 2 1 25%25% 3 1 5 4 2 1 8 8 6 5 9 1 3 1 3.53.5 2 1 8 5 25 16 12 7 6 6 8 3 3 2 6 6 4 1 8 8 3 1 7 1 8 1 3 2 2.42.4 8 3 1 172%72% 二、解方程:二、解方程: 125%X125%XX X28 28 (1 140%40%)X X98 98 1 120%X20%X 4 1 1 1 20%X20%X 4 1 80%X80%X 1212 40 40 X X20%X20%X16 16 X X 30%X30%X 65 165 1 3 1 X X 6 5 60%X6
3、0%X252540 40 1 1 25%X25%X 4 3 X X 25%X25%X 4 3 2X2X30%X30%X9.29.2 X X25%X25%X2.8 2.8 (1 160%60%)X X0.32 0.32 125%X125%XX X44 44 1 1 40%X40%X 0.7 X0.7 X 15%X15%X 42.5 42.5 78%X78%X45=8445=84 六年级数学专项练习题 一、 计算下面各题。 7 5 32(1-37.5%) ( 3 1 4 1 )25% 25% 8 3 +75% 3 8 48% 6 5 +41 5 3 9 8 75%-( 16 7 -25%) 5 1
4、2 ( 6 5 + 4 3 )+52% (84%3+8.72) 10 9 10 1 3 2 (80% 3 1 ) 7 2 + 8 3 9 4 + 6 5 80%(60% 2 1 ) 87.5% 1( 12 7 50%)12.5% 5 4 7 8 + 7 6 125% 二、解方程。 60%x+25=40 x10%x=18 2x%= 40 13 x+30%x=52 (125%)x=36 4 3 x5x%=17.5 40%X3015 2X20%X3.3 162.5%-x=15/16 x+70%x=340 2x/3+75%x=1/6 70%X + 20%X = 3.6 X - 15%X = 68 40
5、%x+21=37 2x+20%x=3.3 0.5+50%x=3 60%x+25=40 24-120%x=18 x 25%x = 60 60 x + 60 25% x = 75 x 60%x = 10 x + 20%x = 360 x + 30%x = 78 25%x + 35%x = 6 35%x - 25%x = 1 x + 20x = 48 x - 20x = 36 140x - x = 40 x - 75x = 6 x + 60x = 48 40%X+25%X=130 x+20%x=6 x+70%x=34 x-15%x=10.2 (1-25%)X=45 x+50%x=30 x-40%x=12 2/3x-45%x=2.4 x-40%x=3.6 25%x-16=24 30%x+90=117 x-20%x=28 14%x-9.1=0.7 35%x+x=13.5 x-75%x=0.5 x-45%x=110 75%x-50=22 60%+4x=27.6