比比誰(shuí)算的快.
12÷1000=
240-40÷5= 120÷6×2= 99×73+73=
1.03×1000= 0÷125×8= 48÷8×6= 25×4÷25×4=
分析:①⑤小數(shù)點(diǎn)的移動(dòng),④采用乘法分配律使問(wèn)題簡(jiǎn)化,⑥0除以任何數(shù)都得0,0乘任何數(shù)都是0.其他題按照整數(shù)四則混合運(yùn)算法則進(jìn)行求解.
解答:解:①12÷1000,
=0.012;

②240-40÷5,
=240-8,
=232;

③120÷6×2,
=20×2,
=40;

④99×73+73,
=(99+1)×73,
=100×73,
=7300;

⑤1.03×1000,
=1030;

⑥0÷125×8,
=0;

⑦48÷8×6
=6×6,
=36;

⑧25×4÷25×4,
=100÷25×4,
=4×4,
=16.
點(diǎn)評(píng):此題考查了快速計(jì)算能力,靈活應(yīng)用計(jì)算規(guī)律,簡(jiǎn)化復(fù)雜計(jì)算.
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