（0.3+4）+（0.3+4×2）+…+（0.3+4×10）
分析：根據(jù)題意，可知是0.3加4的1倍，0.3加4的2倍，一直到0.3加4的10倍，去掉括號(hào)后一共有10個(gè)0.3相加，再加上4的1倍，4的2倍，一直加到4的10倍，即4×（1+2+…+10）即可．
解答：解：根據(jù)題意可得：
（0.3+4）+（0.3+4×2）+…+（0.3+4×10），
=0.3×10+4×（1+2+…+10），
=3+4×55，
=3+220，
=223．
點(diǎn)評(píng)：根據(jù)題意，弄清它們之間的關(guān)系，然后再根據(jù)運(yùn)算定律進(jìn)行巧算即可．
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