Question

20．脱式计算．
2.05÷0.82+33.6
30-40.5÷3
44.28÷0.9÷4.1．

Answer 1

分析 ①先算除法再算加法．
②先算除法再算减法．
③从左往右计算．

解答 解：①2.05÷0.82+33.6
=2.5+33.6
=36.1

②30-40.5÷3
=30-13.5
=16.5

③44.28÷0.9÷4.1
=49.2÷4.1
=12．

点评 本题考查了小数四则混合运算顺序的掌握情况．