-0.01= | 2 + = | 27 ÷9= | ( - )×12= | 0.39÷2 = | 2 +5.75= |
1 ÷1 = | 7-7÷9= | ×1.8= | 0.6÷ = | 2.1÷0.35= | 1 ÷1+0.15= |
-0.01=0.09, | 2 + =2 , | 27 ÷9=3 , | ( - )×12=1, | 0.39÷2 =0.15, | 2 +5.75=7.95, |
1 ÷1 = , | 7-7÷9=6 , | ×1.8=1.2, | 0.6÷ =1, | 2.1÷0.35=6, | 1 ÷1+0.15=1.3. |
分析:根据分数和小数加减乘除的计算方法进行计算即可.
点评:口算时,注意运算符号和数据,然后再进一步计算即可.
-0.01=
+
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÷9=
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)×12=
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+5.75=
÷1
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×1.8=
÷1+0.15=
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,