1994x808+100-9x70
cứu em với
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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^^
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 ~
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.
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
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
= 1611152 + 100 - 630
= 1610622
1610622