32÷3×12=
128
128
              
10+12+14+…+24+26=
162
162
分析:(1)先調(diào)整一下運(yùn)算順序,原式變?yōu)?2×(12÷3),先算除法,再算乘法;
(2)此算式是一個(gè)公差為2的等差數(shù)列,運(yùn)用高斯求和公式即可解答.
解答:解:(1)32÷3×12,
=32×(12÷3),
=32×4,
=128;

(2)10+12+14+…+24+26,
=(10+26)×9÷2,
=36×9÷2,
=162.
點(diǎn)評(píng):此題考查了調(diào)整運(yùn)算順序以及運(yùn)用高斯求和公式簡(jiǎn)算的能力.
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