a) (100 + 67) x 67 + (200 - 33) x 33

= 167 x 67 + 167 x 33

= 167 x (67 + 33)

= 167 x 100

= 16700

b) 45,651 x 73 + 45,651 x 20 + 45,651 x 7

= 45,651 x (73 + 20 + 7)

= 45,651 x 100

= 4565,1

c) 14,2 x 30 + 14,2 x 57 + 14,2 x 13

= 14,2 x (30 + 57 + 13)

= 14,2 x 100

= 1420

a) (100 + 67) × 67 + (200 - 33) × 33

= 167 × 67 + 167 × 33

= 167 × 100

= 16700

b) 45,651 × 73 + 45,651 × 20 + 45,651 × 7

= 45,651 × (73 + 20 + 7)

= 45,651 × 100

= 4565,1

c) 14,2 × 30 + 14,2 × 57 + 14,2 × 13

= 14,2 × (30 + 57 + 13)

= 14,2 × 100

= 1420

a: \(=167\cdot\dfrac{67}{1000}+167\cdot\dfrac{33}{1000}=167\cdot\dfrac{1}{10}=\dfrac{167}{10}\)

Cảm ơn nha!!

Sửa đề: \(\frac{20}{33}\times\frac{23}{69}\times\frac{69}{180}\)

Ta có: \(\frac{20}{33}\times\frac{23}{69}\times\frac{69}{180}\)

\(=\frac{20}{180}\times\frac{23}{33}\times\frac{69}{69}\)

\(=\frac19\times\frac{23}{33}=\frac{23}{297}\)

3,24 x 200

= 3,24 x 100 x 2

= 324 x 2

= 648

Mk nhanh nhất đó

3,24 x 200 = (3,24 x 100)x2 = 324 x 2 = 648

20/11*33/23*69/180=1/1*3/1*3/9=1 

\(\frac{20}{11}\cdot\frac{33}{23}\cdot\frac{69}{180}=\frac{20\cdot33\cdot69}{11\cdot23\cdot180}=\frac{9}{9}=1\)

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

\(\left(100+67\right).67+\left(200-33\right).33\)

\(=167.67+167.33\)

\(=167.\left(67+33\right)=167.100=16700\)

ĐỀ BẠN TỰ GHI À NHA

=167x67+167x33

=167x(67+33)

=167x100

=16700

20/11*33/23*69/180=20/11*33/23*23/60