5×1.3÷5×1.3
99×10.1
58×10.1-5.8
128.8÷23+9.2×0.35.
分析:(1)按照從左到右順序計(jì)算即可解答,
(2)(3)運(yùn)用乘法分配律解答,
(4)按照先同時(shí)計(jì)算除法和乘法,再算加法的順序即可解答.
解答:解:(1)5×1.3÷5×1.3,
=6.5÷5×1.3,
=1.3×1.3,
=1.69;

(2)99×10.1,
=99×10+99×0.1,
=990+9.9,
=999.9;

(3)58×10.1-5.8,
=(10.1-0.1)×5.8,
=10×5.8,
=58;

(4)128.8÷23+9.2×0.35,
=5.6+3.22,
=8.82.
點(diǎn)評(píng):本題考查知識(shí)點(diǎn):(1)依據(jù)四則運(yùn)算計(jì)算方法正確進(jìn)行計(jì)算,(2)正確運(yùn)用簡(jiǎn)便算法解決問(wèn)題.
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