3+數(shù)學(xué)公式-3+數(shù)學(xué)公式=0.1×30%=2÷1%-2=數(shù)學(xué)公式÷數(shù)學(xué)公式=0.32=
1÷數(shù)學(xué)公式×數(shù)學(xué)公式=0.125×16=2.58+7.42=0.042÷0.6=6.4-4=

解：

3+-3+=，
0.1×30%=0.03，
2÷1%-2=198，
÷=2，
0.32=0.09，
1÷×=，0.125×16=2，2.58+7.42=10，0.042÷0.6=0.07，6.4-4=2.4．

分析：3+-3+運(yùn)用加法交換律和結(jié)合律簡算；÷根據(jù)除以一個數(shù)等于乘這個數(shù)的倒數(shù)計算；1÷×按照從左到右的順序計算；0.125×16先把16分解成8×2再根據(jù)乘法結(jié)合律簡算；其它題目根據(jù)小數(shù)加、減、乘、除的運(yùn)算法則求解．
點(diǎn)評：完成本題要根據(jù)運(yùn)算法則認(rèn)真分析式中數(shù)據(jù)，然后快速準(zhǔn)確得出答案．
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