a, 15.27 - 3.5.17
= 15.27 - 15. 17
= 15 . ( 27 - 17 )
= 15 . 10
= 150
b, 55 - 5 . ( 20 + 11 )
= 55 - 100 . 55
= 55 . ( 1 - 100 )
= 55 . ( -99 )
= ...
a,15.27-3.5.17
=15.27-15.17
=15(27-17)
=15.10=150
b,55-5(20+11)
=5.11-5.20-5.11
=5(11-20-11)
=5.(-20)=-100
c,37(29-23)-29(37-23)
=37.29-37.23-29.37+29.23
=37.29-29.37-37.23+29.23
=0+(-37+29).23
=-8.23=-184
a,15.27-3.5.17
=15.27-15.17
=15.(27-17)
=15x10
=150
b,55-5.(20+11)
=55-5.20+5.11
=55-100+55
=-45+55
=10
c,37.(29-23)-29.(37-23)
=37.29-37.23-29.37-29.23
=37.(29-29)-23.(37-29)
=37.0-23.8
=0-184
=-184
NHỚ TICK NHA !!!!!!
\(a,15.27-3.5.17=15.27-15.17\)
\(=15.\left(27-17\right)\)
\(=15.10\)
\(=150\)
\(c,37.\left(29-23\right)-29.\left(37-23\right)\)
\(=37.29-37.23-29.37+29.23\)
\(=\left(37.29-29.37\right)-\left(37.23+29.23\right)\)
\(=0-\left(37.23+29.23\right)\)
\(=0-37.23-29.23\)
\(=0-23.\left(37+29\right)\)
\(=0-23.8\)
\(=0-184=-184\)
TICK CHO MÌNH NHA
