Question

直接寫(xiě)出得數(shù)．

0.4+8.7=	4.5+3.6=	0.28+0.54=	1.4-0.9=	7.1-3.5=
3-1.4=	1÷10=	0.32÷100=	0.7×100=	3.5×1000=
1.2-0.5=	0÷3200=	25×4÷25×4=	0.704-0.25=	0.3+0.03=
10-0.85=	14.5+5.74=	6.21-1.7=

Answer 1

考點(diǎn)：小數(shù)的加法和減法,小數(shù)乘法,小數(shù)除法,小數(shù)四則混合運(yùn)算

專(zhuān)題：運(yùn)算順序及法則

分析：本題根據(jù)小數(shù)的減法、乘法與除法的運(yùn)算法則計(jì)算即可．

解答：

解：0.4+8.7=9.1	4.5+3.6=8.1	0.28+0.54=0.82	1.4-0.9=0.5	7.1-3.5=3.6
3-1.4=1.6	1÷10=0.1	0.32÷100=0.0032	0.7×100=70	3.5×1000=3500
1.2-0.5=0.7	0÷3200=0	25×4÷25×4=16	0.704-0.25=0.454	0.3+0.03=0.33
10-0.85=9.15	14.5+5.74=20.24	6.21-1.7=4.51

點(diǎn)評(píng)：完成小數(shù)加減法時(shí)要注意小數(shù)點(diǎn)對(duì)齊，完成小數(shù)乘除法時(shí)要注意小數(shù)點(diǎn)位置的變化．