\(36\cdot532+64\cdot532=532\cdot100=53200\)

36 x 532 + 64 x 532

=(36+64)x532

= 100x532

=53 200

245 x 327 - 245 x 26 - 245

=245x327-245x26-245x1

=245x(327-26-1)

=245x300

=73 500

Những câu nào có thể làm được thì em nên tự làm, câu nào khó hoặc chưa hiểu thì mới hỏi đề thầy cô, bạn bè giúp đỡ. Như vậy em mới vững kiến thức để còn học lên các lớp trên và thi cấp ba sau này

Bằng 15680 nhé tk cho mk nhé

245x64=15680

15680

mk nhanh nhất 

K cho mk nhé

\(\text{–( –2019 + 2020 ) + (– 2019 ) – ( 1234 – 2020 ) }\)

\(=2019-2020-2019-1234+2020\)

\(=\left(2019-2019\right)+\left(-2020+2020\right)-1234\)

\(=0+0-1234=-1234\)

\(\text{– 25.800 .( – 0,04).1,25.2020}\)

\(=\left(-25\right).\left(-0,04\right).800.1,25.2020\)

\(=1.1000.2020=2020000\)

\(\text{( 5678 – 975 ) – (– 975 + 678 ) + 4000 }\)

\(=5678-975+975-678+4000\)

\(=\left(5678-678\right)+\left(-975+975\right)+4000\)

\(=5000+0+4000=9000\)

\(\text{– 78. (–245 ) + 245. 22}\)

\(=245.\left(78+22\right)\)

\(=245.100=24500\)

\(\text{765.( – 36) – 765. 64 }\)

\(=765.\left[\left(-36\right)-64\right]\)

\(=765.\left(-100\right)=-76500\)

\(\text{5632.121 + 5632 – 5632.22 }\)

\(=5632.\left(121+1-22\right)\)

\(=5632.100=563200\)

chúc bạn học tốt !!!!

64 x 245 - 64 x 124

= 64 x ( 245 - 124 )

= 64 x 121 

= 7744

56 x 5 + 76 x 5

= 5 x ( 56 + 76 )

= 5 x 132

= 660

~ Chúc bạn học tốt ~

   64 x ( 245 - 124 )

= 64 x 121

= 7744

Đ/s: 7744

k nha

64 x 245 - 64 x 124

= 64 x (245 - 124)

= 64 x 121

=7744

Rewrite the following sentences without changing the meaning. (Hãy viết lại các câu sau sao cho nghĩa không thay đổi.) 1. The car is so old that he doesn't want to drive it.
It is such an old car that he doesn't want to drive it. 2. The weather was very cold. We couldn't go out.
The weather was too cold for us to go out. 3. The film was so interesting that we couldn't miss it.
It was such an interesting film that we couldn't miss it. 4. The film was very good. We saw it through.
The film was good enough for us to see it through. 5. The children were very late. They couldn't see the display of fireworks.
The children were too late to see the display of fireworks. 6. She has a lot of money and she doesn't know what to do with it.
She has such a lot of money that she doesn't know what to do with it. 7. The play was very amusing. They enjoyed it.
The play was amusing enough for them to enjoy it. 8. Briget fell asleep during the film because she was very tired.
Briget was so tired that she fell asleep during the film. 9. The food was so spicy that I couldn't eat it.
We had such spicy food that I couldn't eat it. 10. The steak is too salty to eat.
The steak is not bland enough to eat.

. The car is so old that he doesn't want to drive it.
It is he doesn't want to drive it. 2. The weather was very cold. We couldn't go out.
The weather was to go out. 3. The film was so interesting that we couldn't miss it.
It was we couldn't miss it. 4. The film was very good. We saw it through.
The film was to see it through. 5. The children were very late. They couldn't see the display of fireworks.
The children were the display of fireworks. 6. She has a lot of money and she doesn't know what to do with it.
She has that she doesn't know what to do with it. 7. The play was very amusing. They enjoyed it.
The play was to enjoy it. 8. Briget fell asleep during the film because she was very tired.
Briget she fell asleep during the film. 9. The food was so spicy that I couldn't eat it.
We had I couldn't eat it. 10. The steak is too salty to eat.
The steak to eat.

0 câu trả lời

. The car is so old that he doesn't want to drive it.
It is such an old car that he doesn't want to drive it. 2. The weather was very cold. We couldn't go out.
The weather was not warm enough for us to go out. 3. The film was so interesting that we couldn't miss it.
It was such an interesting film that we couldn't miss it. 4. The film was very good. We saw it through.
The film was good enough for us to see it through. 5. The children were very late. They couldn't see the display of fireworks.
The children were so late that they couldn't see the display of fireworks. 6. She has a lot of money and she doesn't know what to do with it.
She has so much money that she doesn't know what to do with it. 7. The play was very amusing. They enjoyed it.
The play was very amusing to enjoy it. 8. Briget fell asleep during the film because she was very tired.
Briget was very tired, so she fell asleep during the film. 9. The food was so spicy that I couldn't eat it.
We had such a spicy food I couldn't eat it. 10. The steak is too salty to eat.
The steak is so salty to eat.

\(=245\left(327-26-1\right)=245\cdot300=73500\)

a) 18¹⁰ : 3¹⁰ = (2.3²)¹⁰ : 3¹⁰ = 2¹⁰ . 3²⁰ : 3¹⁰ = 2¹⁰ . 3¹⁰ = 6¹⁰

b) 27⁶ : 9 = (3³)⁶ : 9 = 3¹⁸ : 3² = 3^18-2 = 3¹⁶

c) Thiếu dữ liệu đề bài

d) 2²⁵ : 32⁴ = 2²⁵ : (2⁵)⁴ = 2²⁵ : 2²⁰ = 2⁵

Bài 2 : 5.x² = 245 => x² = 245:5 = 49 => x = \(\pm\)7

mk đang cần gấp

( X + 5 ) + ( X - 5 ) + ( X x 5 ) + ( X : 5 ) = 52

X + 5 + X - 5 + ( X x 5 ) + ( X : 5 ) = 52

( X + X ) + ( 5 - 5 )+ 5X + X/5=52

2X+(5X+X/5)=52

2X=52

X=52/2=26

\(\left(x+5\right)+\left(x-5\right)+\left(x.5\right)+\left(x:5\right)=52\)

\(\Leftrightarrow x+5+x-5+5x+\frac{x}{5}=52\)

\(\Leftrightarrow7x+\frac{x}{5}=52\)

\(\Leftrightarrow x.\left(7+\frac{1}{5}\right)=52\)

\(\Leftrightarrow x.\frac{36}{5}=52\)

\(\Leftrightarrow x=\frac{65}{9}\)

Vậy ...

245*(3-7+14)

=245*10

=2450

= 245 x (3+14-7)

= 245 x 10

= 2450

43701630