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1. 用竖式计算。
2.37 - 1.$\dot{5}$ =
1.55 + 0.2$\dot{6}$ =
1.$\dot{0}$$\dot{9}$ + 2.63 =
3 - 2.$\dot{1}$5$\dot{7}$ =
2.37 - 1.$\dot{5}$ =
1.55 + 0.2$\dot{6}$ =
1.$\dot{0}$$\dot{9}$ + 2.63 =
3 - 2.$\dot{1}$5$\dot{7}$ =
答案
1. $0.81\dot{4}$
$1.81\dot{6}$
$3.72\dot{0}\dot{9}$
$0.\dot{8}4\dot{2}$
$1.81\dot{6}$
$3.72\dot{0}\dot{9}$
$0.\dot{8}4\dot{2}$
2. 计算下面各题。
$4.\dot{3} - 2.\dot{6} =$
$3.\dot{3}\dot{8} - 2.\dot{2}\dot{5} =$
$1.\dot{2}0\dot{3} + 2.4\dot{8}\dot{6} =$
$2.\dot{8}\dot{9} - 1.\dot{1}5\dot{7} =$
$4.\dot{3} - 2.\dot{6} =$
$3.\dot{3}\dot{8} - 2.\dot{2}\dot{5} =$
$1.\dot{2}0\dot{3} + 2.4\dot{8}\dot{6} =$
$2.\dot{8}\dot{9} - 1.\dot{1}5\dot{7} =$
答案
2. $1.\dot{6}$
$1.\dot{1}\dot{3}$
$3.69\dot{0}071\dot{8}$
$1.\dot{7}4183\dot{2}$
$1.\dot{1}\dot{3}$
$3.69\dot{0}071\dot{8}$
$1.\dot{7}4183\dot{2}$
