`x - 64 = -(-245)`
`=> x - 64 = 245`
`=> x = 245 + 64`
`=> x = 309`
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Tính hợp lý
–( –2019 + 2020 ) + (– 2019 ) – ( 1234 – 2020 )
– 25.800 .( – 0,04).1,25.2020
( 5678 – 975 ) – (– 975 + 678 ) + 4000
– 78. (–245 ) + 245. 22
765.( – 36) – 765. 64
5632.121 + 5632 – 5632.22
Bài 1.Viết dạng 1 luỹ thừa.
a,18 mũ 10 : 3 mũ 10
b,27 mũ 6 : 9
c,4mũ : 64 mũ 3
d,2 mũ 25 :32 mũ 4
Bài 2.Tìm x
5.x^2=245
CHỮA NHANH CHO MÌNH NHA !!!!
so sánh các phân số sau bằng cách hợp lý
a) 27/83 và 26/75
b) -49/78 và 64/-95
c) -18/91 và 23/-114
d) -2525/2929 và -217/245
so sánh a, 134/43 , 55/21 , 74/19 và 116/37
b, 16/9 và 24/13
c, -2525 và -217/ 245
d, 27/82 và 26/75
e, -49/78 và 64/-95
Mọi người giúp mình với nhé ^-^_^^
A group of students, including boys and girls are very close, anytwo of you in the group are close friends. The guys say to each other that we each have some guys with some female friends. Andthe girls say to each other that we each have twice the number ofmen you girls. (Note: Some friends of each person included in thegroup). That group of students asked how many of you men, how many girls?
Đọc tiếp
A group of students, including boys and girls are very close, anytwo of you in the group are close friends. The guys say to each other that we each have some guys with some female friends. Andthe girls say to each other that we each have twice the number ofmen you girls. (Note: Some friends of each person included in thegroup). That group of students asked how many of you men, how many girls?
x+245 =43.11
Tìm x ∈ N thỏa mãn 245 ⋮ x,294⋮x và 25 < x ≤51
Tìm x, biết:
a) − x − 1 9 = − 2 45
b) − 3 7 − x = 4 5 + − 2 3
Tìm x biết
a) x − − 5 6 = 7 12 + − 1 4
b) − x − 1 9 = − 2 45
Tìm x , 245 - 5(16 + x) = 140