问题
填空题
求:0.1
|
答案
0.1
+0.2• 2
+0.3• 3
+0.4• 4
+0.5• 5
+0.6• 6
+0.7• 7
+0.8• 8 • 9
=
+11 90
+21 90
+31 90
+41 90
+51 90
+61 90
+71 90 81 90
=11+21+31+41+51+61+71+81 90
=(11+81)×8÷2 90
=368 90
=184 45
=4
.4 45