77 : 18
79 : 36
K
Khách
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NM
1
NT
Nguyễn Thị Thương Hoài
Giáo viên
VIP
12 tháng 1 2024
Đây là dạng toán nâng cao chuyên đề dấu hiệu chia hết cho 5; Cấu trúc thi chuyên thi học sinh giỏi, thi violympic. Hôm nay olm sẽ hướng dẫn các em giải dạng này như sau.
A = 3636 + 7755 - 2
A = \(\overline{..6}\) + (774)13.773 - 2
A = \(\overline{..6}\) + \(\overline{..1}\)13.3 - 2
A = \(\overline{..6}\) + \(\overline{..3}\) - 2
A = \(\overline{..9}\) - 2
A = \(\overline{..7}\) không chia hết cho 5
TH
3
LP
0
KY
30 tháng 7 2021
Choose A, B, C or D to find out a sentence that has the same meaning as the given one.
26. They built the first hydroelectric power plant in Niagara Falls in 1879.
A. In 1879, they was built the first hydroelectric power plant in Niagara Falls
B. The Niagara Falls was built in the first hydroelectric power plant in 1879.
C. The first hydroelectric power plant in Niagara Falls was build in 1879.
D. The first hydroelectric power plant was built in Niagara Falls in 1879.
27. He is not a poor man any more, but he becomes a rich businessman.
A. Although being a rich businessman, he’s still poor.
B. He is used to being a rich businessman, there’s no way that he becomes a poor man.
C. He used to be a poor man, but now he doesn’t any more.
D. In spite of his richness, he becomes a poor man any way.
28. Although coal is the most polluting of fossil fuels, it is still the largest sources of energy worldwide.
A. Despite of being the most polluting of fossil fuels, it is still the largest sources of energy worldwide.
B. Coal is the most polluting of fossil fuels, but it is still the largest sources of energy worldwide.
C. Despite being the most polluting of fossil fuels, coal is still the largest sources of energy worldwide.
D. However coal is still the largest sources of energy worldwide, it is the most polluting of fossil fuels.
Choose A, B, C or D to find out a sentence that is meaningful based on the given words.
29. Number/ people/ this/ small area/ be/ increase/ quickly/ next/ 20 years.
A. The number of people in this small area will increase quickly in the next 20 years.
B. The number of people in this small area will be increasing quickly in the next 20 years.
C. The number of people in this small area will be increased quickly in the next 20 years.
D. The number of people in this small area is creasing quickly in the next 20 years.
30. Government/ be/ organize/ educational campaigns/ use/ renewable energy sources.
A. The government will be organizing educational campaigns on using renewable energy sources.
B. Educational campaigns on using renewable energy sources will be organize by the government.
C. The government are organizing educational campaigns on using renewable energy sources.
D. The government is organizing educational campaigns on using renewable energy sources.
KY
30 tháng 7 2021
Choose A, B, C or D to find out a sentence that has the same meaning as the given one.
26. They built the first hydroelectric power plant in Niagara Falls in 1879.
A. In 1879, they was built the first hydroelectric power plant in Niagara Falls
B. The Niagara Falls was built in the first hydroelectric power plant in 1879.
C. The first hydroelectric power plant in Niagara Falls was build in 1879.
D. The first hydroelectric power plant was built in Niagara Falls in 1879.
27. He is not a poor man any more, but he becomes a rich businessman.
A. Although being a rich businessman, he’s still poor.
B. He is used to being a rich businessman, there’s no way that he becomes a poor man.
C. He used to be a poor man, but now he doesn’t any more.
D. In spite of his richness, he becomes a poor man any way.
28. Although coal is the most polluting of fossil fuels, it is still the largest sources of energy worldwide.
A. Despite of being the most polluting of fossil fuels, it is still the largest sources of energy worldwide.
B. Coal is the most polluting of fossil fuels, but it is still the largest sources of energy worldwide.
C. Despite being the most polluting of fossil fuels, coal is still the largest sources of energy worldwide.
D. However coal is still the largest sources of energy worldwide, it is the most polluting of fossil fuels.
Choose A, B, C or D to find out a sentence that is meaningful based on the given words.
29. Number/ people/ this/ small area/ be/ increase/ quickly/ next/ 20 years.
A. The number of people in this small area will increase quickly in the next 20 years.
B. The number of people in this small area will be increasing quickly in the next 20 years.
C. The number of people in this small area will be increased quickly in the next 20 years.
D. The number of people in this small area is creasing quickly in the next 20 years.
30. Government/ be/ organize/ educational campaigns/ use/ renewable energy sources.
A. The government will be organizing educational campaigns on using renewable energy sources.
B. Educational campaigns on using renewable energy sources will be organize by the government.
C. The government are organizing educational campaigns on using renewable energy sources.
D. The government is organizing educational campaigns on using renewable energy sources.
NA
3
TM
18 tháng 9 2015
36^38+41^33
= 36^33 . 36^5 + 41^33
= 36^33 . 36^5 + 36^33 - 36^33 + 41^33
= 36^33(36^5+ 1) - (36^33 - 41^33)
= 77.Q1 - 77.Q2
=> chia hết cho 77
TM
18 tháng 9 2015
CM A chia hết cho 7 và 11. Nếu bạn đã biết qua về lý thuyết đồng dư thì có thể giải thế này:
* 36 mod 7 = 1 nên 36^38 mod 7 = 1; 41 mod 7 = -1 nên 41^33 mod 7 = (-1)^33 = -1
suy ra A mod 7 = 0 hay A chia hết cho 7.
* 36 mod 11 = 3, 41 mod 11 =-3 nên A mod 11 = 3^ 38 - 3^33 =3^33 (3^5 - 1) =3^33. 242
Vì 242 chia hết cho 11 nên A mod 11 = 0.
Vậy A chia hết cho 7.11 =77
TT
1
22 tháng 6 2019
Câu 1 : -123 + 77 + ( - 257 ) + 23 - 43
= ( -123 + 23 ) + ( -257 + 77 ) - 43
= -100 + ( -180 ) - 43
= -280 - 43
= -323
Câu 2 : ( 36 + 79 ) + ( 145 - 79 - 36 )
= 36 + 79 + 145 - 79 - 36
= ( 36 - 36 ) + ( 79 - 79 ) + 145
= 0 + 0 + 145
= 145
22 tháng 6 2019
Câu 1 : ( -123) + 77 + (-257) + 23 - 43 =
= [ (-123) +23 ] + [ (-257) - 43 ) + 77
= (-100) + (-300) + 77
= (-400) + 77
= -323
Câu 2 : ( 36 + 79 ) + ( 145 - 79 - 36 ) =
= 36 + 79 + 145 - 79 - 36
= ( 36 - 36 ) + ( 79 - 79 ) + 145
= 0 + 0 + 145
= 145
Học tốt nhé###
77 : 18 = 4 (dư 5)
79 : 36 = 2 (dư 7)
ta có: