口算
8×0.4=
0.1-0.01= 1÷0.25= 2.5+0.6=
0.12×0= 0.63÷0.9= 5.2+3.8= 5-0.64=
8.7-0.55-0.45= 1÷0.125÷8=
分析:根據(jù)小數(shù)四則運算的方法進行依次口算即可.
解答:解:8×0.4=3.2            0.1-0.01=0.09              1÷0.25=4              2.5+0.6=3.1,
  0.12×0=0               0.63÷0.9=0.7              5.2+3.8=9              5-0.64=4.36,
 8.7-0.55-0.45=7.7        1÷0.125÷8=1.
點評:此題較簡單,屬于簡單的小數(shù)口算題,做此類題的關(guān)鍵要認真,看準運算符號和數(shù)字.
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