简便计算:53×101 ...
简便计算:53×10125×24138+75+62+125(25×13)×4(125+12)×847×99+47...
简便计算:53×101 25×24 138+75+62+125 (25×13)×4 (125+12)×8 47×99+47
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(1)53×101
=53×(100+1)
=53×100+53×1
=5300+53
=5353;
(2)25×24
=25×4×6
=100×6
=600;
(3)138+75+62+125
=(138+62)+(75+125)
=200+200
=400;
(4)(25×13)×4
=25×13×4
=25×4×13
=100×13
=1300;
(5)(125+12)×8
=125×8+12×8
=1000+96
=1096;
(6)47×99+47
=47×(99+1)
=47×100
=4700.
=53×(100+1)
=53×100+53×1
=5300+53
=5353;
(2)25×24
=25×4×6
=100×6
=600;
(3)138+75+62+125
=(138+62)+(75+125)
=200+200
=400;
(4)(25×13)×4
=25×13×4
=25×4×13
=100×13
=1300;
(5)(125+12)×8
=125×8+12×8
=1000+96
=1096;
(6)47×99+47
=47×(99+1)
=47×100
=4700.
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