在括号里填上适当的数 ×15=7.5; ×13=59.8; 54.4÷ =16;40.5÷ =15; +8=10.4; 4× =1.44.
:35==10÷ = %= 成.
4:5==20: = %
3÷8==24: = %.
0.2: == ﹣== %
0.6: =9.6÷ =1.2= %.