( − 48 ) .72 + 36. ( − 304 ) = ( − 48 ) .2.36 + 36. ( − 304 ) = ( − 96 ) .3 + 36. ( − 304 )

a)  ( − 4 ) .13. ( − 250 ) = ( − 4 ) . ( − 250 ) .13 = 1000.13 = 13000

b)  ( − 37 ) .84 + 37. ( − 16 ) = ( − 37 ) .84 + ( − 37 ) .16 = ( − 37 ) . ( 84 + 16 ) = ( − 37 ) .100 = − 3700

c)  25. ( − 5 ) .4. ( − 20 ) = 25.4. ( − 5 ) . ( − 20 ) = 100.100 = 10000

d)  ( − 48 ) .72 + 36. ( − 304 ) = ( − 48 ) .2.36 + 36. ( − 304 ) = ( − 96 ) .3 + 36. ( − 304 )

(-48).72+72.(-152)=72.(-200)=-14400

=(-48).2.36+36.(-304)

=(-96).36+36.(-304)

=36.[-96+(-304)]

=36.-400

=-14400

K VÀ KẾT BẠN VỚI MÌNH NHA !

Bài 2:

a. $=62-81-12+59-9=(62-12)+(59-9)-81$

$=50+50-81=100-81=19$

b. $=39+13-26-62-39=(39-39)+13-(26+62)$

$=0+13-88=-(88-13)=-75$

c. $=(32-42)+(36-34)+(40-38)=10+2+2=14$
d. $=92-55+8-45=(92+8)-(55+45)=100-100=0$

Bài 1:

a. $=(387-87)-224=300-224=76$

b. $=-(75+35)+379=-110+379=379-110=269$

c. $=(11+15)-(13+17)=25-30=-5$

d. $=(31-21)-(27-24)=10-3=7$

b) 36 : 3 2 + 3 2 . 2 3  -150

= 36 : 9 + 9 . 8 – 1 = 4 + 72 – 1 = 76 – 1 = 75

= 27 x 45 + 27 x 55

= 27 x (45 + 55)

= 27 x 100

= 2700

Trl:

-24 - (-64) - 75 + 36

= -24 + 64 - 75 + 36

= 40 - 75 + 36

= -35 + 36

= 1

Hc tốt 

- 24 - ( - 64 ) - 75 + 36 

= - 24 + 64 - 75 + 36 

= (- 24 - 75 ) + ( 64 + 36 ) 

= - 99 + 100 

= 1

= 372 x ( 36+63+1 )

= 372 x 100

= 37200