Mathematics learning weekly, seventh grade, volume I, 20 12~20 13, People's Education Edition, 27~3 1 Edition Answer
jdienul 2 12548 kfeuudhukrbye 1874 14，7855，987，9987，9/89，25558，2544665，55。 /5444,565/444, 1 1; 32\555[3]52[22 12[ 1] 15] 1[5] 1[5] 15[2200 134.36 123.654 1.86099587*/