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a) Số trung bình cộng của 42 và 52 là:
(42 + 52) : 2 = 47
b) Số trung bình cộng của 36; 42 và 52 là:
(36 + 42 + 52) : 3 = 45
c) Số trung bình cộng của 34; 43; 52 và 39 là:
( 34 + 43 + 52+ 39) : 4 = 42
d) Số trung bình cộng của 20; 35; 37; 65 và 73 là:
( 20 + 35 + 37 + 65 + 73) : 5 = 46
`a, (42+52):2=47`
`b, (36+42+57):3=45`
`c,(34+43+52+39):4=42`
`d,(20+35+37+65+73):5=46`
a, \(\left(42+52\right):2\text{=}47\)
\(b.\left(36+42+57\right):3\text{=}45\)
\(c.\left(34+43+52+39\right):4\text{=}42\)
\(d.\left(20+35+37+73+65\right):5\text{=}46\)
a) \(\dfrac{16}{24};\dfrac{14}{15};\dfrac{25}{27};\dfrac{50}{100}\)
b) \(\dfrac{9}{4};\dfrac{5}{4};\dfrac{7}{5};\dfrac{19}{7};\dfrac{49}{36}\)
c) \(\dfrac{13}{13};\dfrac{35}{35}\)
a: 16/24; 14/15; 25/27; 50/100
b: 9/4; 5/4; 7/5; 19/7; 49/36
c: 13/13; 35/35
=> Đáp án chính xác là d, 13/52 , 14/56 , 36/63.
ai giúp với
a
Đáp án:
d) 13/52 , 14/56 , 36/63
Giải thích: