79米=千米 1.6公顷=平方米
54.3÷=0.543 3.49×=3490
2.16×0.4=8.64
0.9×5.21=4.689
7.9×7.9=6.241
43×6.7=28.81
, 1.6×0.131.6,0.27×bb(b>0),4.08×0.114.08÷0.11
= = = =
= =
( )+( )=一本书的总页数
( )-( )=大米比面粉多用的钱数