计算266+73+34+155+27‚25×5×64×125432+102547-981-2+3-4+5-6+…+1991-1992+1993333×222÷666.-数学

题目简介

计算266+73+34+155+27‚25×5×64×125432+102547-981-2+3-4+5-6+…+1991-1992+1993333×222÷666.-数学

题目详情

计算
266+73+34+155+27‚25×5×64×125432+102
547-981-2+3-4+5-6+…+1991-1992+1993333×222÷666.
题型:解答题难度:中档来源:不详

答案

(1)266+73++155+34+27,
=(266+34)+(73+27)+155,
=300+100+155,
=555;

(2)25×5×64×125,
=25×5×8×8×125,
=(25×8)×5×(8×125),
=200×5×1000,
=1000×1000,
=1000000;

(3)432+102,
=432+100+2,
=532+2,
=534;

(4)547-98,
=547-100+2,
=447+2,
=449;

(5)1-2+3-4+5-6+…+1991-1992+1993,
=1+(3-2)+(5-4)+…+(1993-1992),
=1+[(1993-1)÷2]×1,
=1+996,
=997;

(6)333×222÷666,
=333×2×111÷666,
=666×111÷666,
=111.

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