2014 + 2014 x 2 + 7 x 2014
= 2014 x (1 + 2 + 7)
= 2017 x 10
= 20170
2014 + 2014 x 2 + 7 x 2014
= 2014 + 2014 x 2 + 7 + 2014 +1
= 2014 x ( 7 + 2 + 1 )
= 2014 x 10
= 20140
2014 + 2014 x 2 + 2014 x 7
=2014 x (1 + 2 + 7)
=2014 x 10
=20140
476 x (34267 - 28765 )
=476 x 5502
=2618952
kb nhé
a ,=2014 x 1 + 2014x2 + 2014 x 7
= 2014 x ( 1+2+7)
= 2014 x 10
= 20140
b, =2623236
(ko tính thuận tiện đc)
\(2014+2014\times2+7\times2014\)
\(=2014(1+2+7)\)
\(=2014\times10\)
\(=20140\)
Tính bằng cách thuận tiện :
2014 + 2014 × 2 + 7 × 2014
= 2014 × 1 + 2014 × 2 + 7 × 2014
= 2014 × ( 1 + 2 + 7 )
= 2014 × ( 3 + 7 )
= 2014 × 10
= 20 140
b. 476(34267-28756) = 476(30.000 + 4267 -30.000 + 1244)= 476 x 5511=4.(100+10+10-1)(5000+500+10+1)
=4. (500.000+50.000+1.000+100 + 50.000 + 5.000+100+10 + 50.000 + 5000+100 +10 - 5000-500-10-1)
=4 (500.000 + 150.000 + 6000 - 191)= 2.000.000 + 600.000 + 24.000 - 4x191 = 2.624.000 -4.200 + 4.9)
=2.624.000-800+36=2.623.200+36=2623236