Hết cứu

phũ vậy

\(\text{1994x808+100-9x70}\)

=\(\text{1611152 + 100 - 630 }\)

=\(\text{1610622}\)

35x18-9x70+100

= 35x9x2 - 9x35x2 +100

=  0 +100 = 100

35x18-9x70+100

=35x9x2-9x2x35+100

=0+100

=100

35 x 18 - 9 x 70 + 100

= ( 35 x 9 x 2 ) - ( 9 x 2 x 35 ) + 100

= 0 + 100

= 100

35 x 18 - 9 x 70 + 100

= 35 x 9 x 2 - 9 x 70 + 100

= 70 x 9 - 9  x 70 + 100

= 70 x (9 - 9) + 100

= 70 x 0 + 100

= 0 + 100 = 100

=35*2*6-70*9+100

=70*9-70*9+100.

=0+100.

=100.

Chúc bn học tốt^^

35x18-9x70+100

= 35x2x9-9x70+100

= 70x9-9x70+100

= 0+100

= 100

35 x 18 + 9 x 70 + 18 x 30

 = 35 x 18 + 18 x 35 + 18 x 30

= 18 x ( 35 + 35 + 30 )

= 18 x 100

= 1800

~ Chúc học tốt ~

Ai ngang qua xin để lại 1 L - I - K - E 

35 x 18 + 9 x 70 + 18 x 30

= 35 x 18 + 18 x 35 + 18 x 30

= 18 x ( 35 + 35 + 30 )

= 18 x 100

= 1800

~ Ủng hộ nhé ~

35 x 18 + 9 x 70 + 18 x 30

= 35 x 18 + 9 x 2 x 35 + 18 x 30

= 35 x 18 + 18 x 35 + 18 x 30

= 18 x ( 35 + 35 + 30 )

= 18 x 100

= 1800

I think bicycles are the best transport in Vietnam. It is convenient and good for health. Riding a bicycle, I can develope a strong heart and muscular limbs. Using a bike for transportation also can help you lose weight and improve your overall health. In city or countryside, when you ride bicycle, you don't need to worry about parking problems and can save money on fuel. Morever, bicycles are only means of transport with don't pollute the environment. Those are some reasons why bicycles are the best means of transport in Vietnam.

I think bicycles are the best transport in Vietnam. It is convenient and good for health. Riding a bicycle, I can develope a strong heart and muscular limbs. Using a bike for transportation also can help you lose weight and improve your overall health. In city or countryside, when you ride bicycle, you don't need to worry about parking problems and can save money on fuel. Morever, bicycles are only means of transport with don't pollute the environment. Those are some reasons why bicycles are the best means of transport in Vietnam.
❤☺

OR

I'd a bicycle and I think bicycle is the best means of transport in Vietnam, because if you want to perfectly feel the atmosphere of Vietnam daily life, hire one bicycle and ride around the city in the early morning. in Hanoi, you can see the early morning market, parks in the morning with exercises of local people, Hanoi streets with not many vehicles.

haha, lên đây tham khảo à.

Lời giải:
4.

$29(19-13)-19(29-13)=29.19-29.13-(19.29-19.13)$

$=29.19-29.13-19.29+19.13=(29.19-19.29)-(29.13-19.13)$

$=0-13(29-19)=0-13.10=-130$

5.

$31(-18)+31(-81)-31=31[(-18)+(-81)-1]=31[-(18+81)-1]=31(-100)=-3100$

6.

$(-12).47+(-12).52+(-12)=(-12)(47+52+1)=(-12).100=-1200$

7.

$13(23+22)-3(17+28)=13.45-3.45=45(13-3)=45.10=450$

đề bài giống này đúng ko bạn nếu đúng thì làm theo nha nhớ k cho mình

E= \(1^3+2^3+3^3+...+99^3+100^3\)

=(1-1)1(1+1)+1+(2-1)2(2-1)+2+...+)(99-1)99(99+1)+99+(100-1) 100(100+1)+100

= 1+2+1.2.3+3+2.3.4+...+100+99.100+101

= (1+2+3+..+100) +(1.2.3+2.3.4+...+99.100.101)

= 5050+25497450

=25502500

99 nhóm đầu có số cuối cùng là: \(\frac{\left(99+1\right).99}{2}=4950\)

Vậy số hạng đầu của nhóm thứ 100 là: 4951

Số đầu tiên của nhóm thứ 100 là 4951

bản trình bày ra giúp tớ với

a: Đặt góc có dấu ? là x

Theo hình, ta sẽ suy ra được:

x là góc đối đỉnh với góc 50 độ

=>x=50 độ

b: Đặt góc có dấu ? là x

Theo hình, ta sẽ có được:

x là góc đối đỉnh với góc 123 độ

=>x=123 độ