
简便计算142+586+358+11472×125(40+4)×2555×25+25×45195×201-19
简便计算142+586+358+11472×125(40+4)×2555×25+25×45195×201-195...
简便计算142+586+358+11472×125(40+4)×2555×25+25×45195×201-195
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(1)142+586+358+114
=(142+358)+(586+114)
=500+700
=1200;
(2)72×125
=9×(8×125)
=9×1000
=9000;
(3)(40+4)×25
=40×25+4×25
=1000+100
=1100;
(4)55×25+25×45
=(55+45)×25
=100×25
=2500;
(5)195×201-195
=(201-1)×195
=200×195
=39000.
=(142+358)+(586+114)
=500+700
=1200;
(2)72×125
=9×(8×125)
=9×1000
=9000;
(3)(40+4)×25
=40×25+4×25
=1000+100
=1100;
(4)55×25+25×45
=(55+45)×25
=100×25
=2500;
(5)195×201-195
=(201-1)×195
=200×195
=39000.

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