a,15*(4+5)
c1
15*(4+5)
=15x9
=135
c2
15*(4+5)
=15x4+15x5
=60+75
=135
#hoktot
#hungb
a) 15 x (4 + 5)
= 15 x 9
= 135
15 x (4 + 5)
= 15 x 4 + 15 x 5
= 60 + 75
= 135
b) 45 x (8 - 5)
= 45 x 3
= 135
45 x (8 - 5)
= 45 x 8 - 45 x 5
= 360 - 225
= 135
còn phần b.
b,45*(8-5)
c1
=45x3
=135
c2
45*(8-5)
=45x8-45x5
=360-225
=135
#hoktot
#hungb
![[나 재민]](https://hoc24.vn/images/avt/avt2676275_256by256.jpg)
a, C1 15x(4+5)=15x9=135
C2 15x(4+5)=15x4+15x9=60+75=135
b,C1 45x(8-5)=45x3=135
C2 45x(8-5)=45x8-45x5=360-225=135
C1:15x(4+5)=15x9=135
C2:15x(4+5)=15x4+15x5=60+75=135
C1:45x(8-5)=45x3=135
C2:45x(8-5)=45x8-45x5=360-225=135
Chúc bn học tốt
a)
c1: 15 x (4+5)
= 15 x 9
= 135.
c2: 15 x (4+5)
= 15 x 4 +15 x 5
= 135.
b)
c1: 45 x (8-5)
= 45 x 3
= 135.
c2: 45 x (8-5)
= 45 x 8 - 45 x 5
= 135.
