混合计算:4×9﹣20 15+5×5 35÷7+1080﹣42÷6 (6+3)×9 24÷(17﹣9 )
0.375= :8==6÷ = %
=4÷5=32: = %= 折.
=10÷ = ÷0.3=.
==12÷ =≈ (保留两位小数).
12÷ == %= 折=0.6.