\(\text{36.( -14) (- 14).33 36.( 86) 67.( -14)}\)36.( -14) (- 14).33 36.( 86) 67.( -14)

\(=\left(-14\right).\left(33+67\right)+36.\left[\left(-14\right)+\left(-86\right)\right]\)\(=\left(-12\right)\)=  ( -14 ) . ( 33 + 67 ) + 36.[ ( -14 ) + ( - 86 ) ]

=   (-14 ) .100 + 36 .(-100)

=   -1400 + ( -3600 )

= - 5000

học tốt

b. 0

c. 112

d. 1250

e. -78

f. -67

b) [(24+-67)]-[-67-(-24)]=0
c) 2^3.17-2^3.14=112
d) 26.(-125)-125.(-36)=1250
e) 48-6(12+9)=-78
f) (-67).(1-301)-301.67=-67

Tính bằng cách thuận tiện nhất :

a. 67 x 126 - 67 x 84 - 41 x 67 - 67

= 67 x 126 - 67 x 84 - 41 x 67 - 67 x 1

= 67 ( 126 - 84 - 41 - 1 )

= 67 x 0

=0

b. 36 x 2 x 2 + 7 x 28

=  2 ( 36 x 2 + 14 x 7 )  

= 2 x 170

= 340

c. 24 x 18 + 12 x 64

= 12 x 2 x 18 + 12 x 64

= 12 ( 2 x 18 + 64)

= 12 x 100

= 1200

a. 67 x 126 - 67 x 84 - 41 x 67 - 67

= 67 x 126 - 67 x 84 - 41 x 67 - 67 x 1

= 67 ( 126 - 84 - 41 - 1 )

= 67 x 0

=0

b. 36 x 2 x 2 + 7 x 28

=  2 ( 36 x 2 + 14 x 7 )  

= 2 x 170

= 340

c. 24 x 18 + 12 x 64

= 12 x 2 x 18 + 12 x 64

= 12 ( 2 x 18 + 64)

= 12 x 100

= 1200

70 nha

Đáp án bằng 70 nhé.

20+36+42+52+56+64+67

=( 36+64)+(52 + 42 + 56 ) + 20+67

=100 + 150 + 20 + 67

= 250 + 20 + 67

= 270 + 67

= 337

=(36+64)+(42+67)+(52+56)+20

=100 + 109 + 108 + 20

= 337

a) 36 + 53 + 47 + 64 = (36+64)+(53+47)= 100+100=200

b) =(242-42)+(167-67)= 200+100=300

a/ \(3636\div\left(12x-91\right)=36\)

                 \(12x-91=3636\div36\)

                 \(12x-91=101\)

                 \(12x=101+91\)

                  \(12x=192\)

                 \(x=192\div12\)

                 \(x=16\)

b/ \(\left(x\div23+45\right)\times67=8911\)

    \(x\div23+45=8911\div67\)

   \(x\div23+45=133\)

  \(x\div23=133+45\)

 \(x\div23=178\)

 \(x=178\times23\)

\(x=4094\)

= ( 64+36)+(58+22)+(67+33)

= 100 + 80 +100

= 100x2+80

= 200+80= 280

k mk nha

64 + 58 + 36 + 67 + 33 + 32

= ( 64 + 36 ) + ( 67 + 33 ) + ( 58 + 22 )

= 100 + 100 + 80

= 200 + 80

= 280