7.5+2.5=5.2÷1.3=1.8×0.5=4.5÷0.1=
數(shù)學(xué)公式+數(shù)學(xué)公式=數(shù)學(xué)公式-數(shù)學(xué)公式=數(shù)學(xué)公式×數(shù)學(xué)公式=數(shù)學(xué)公式+數(shù)學(xué)公式)×10=
數(shù)學(xué)公式+數(shù)學(xué)公式=1+2÷3=數(shù)學(xué)公式×數(shù)學(xué)公式=數(shù)學(xué)公式÷數(shù)學(xué)公式=

7.5+2.5=10,
5.2÷1.3=4,
1.8×0.5=0.9,4.5÷0.1=45,
+=,-=×=,+)×10=,
+=71+2÷3=1,×=÷=

分析:(+)×10,先算括號里面的加法,再算括號外面的乘法;
+、1+2÷3,先算除法,再算加法;
×,從左往右按順序計算;
其他算式按照整數(shù)、分?jǐn)?shù)、小數(shù)四則運算的方法計算.
點評:此題考查看算式直接寫得數(shù),根據(jù)數(shù)據(jù)的特點,快速準(zhǔn)確的算出得數(shù)即可.
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