Tính nhanh 1 4 + 1 5 + 3 4 + 4 5
tính nhanh
(-1/3)-3/4-(-1/5)-1/4+4/5+1/3
\(\left(-\dfrac{1}{3}\right)-\dfrac{3}{4}-\left(-\dfrac{1}{5}\right)-\dfrac{1}{4}+\dfrac{4}{5}+\dfrac{1}{3}\)
\(=\left[\left(-\dfrac{1}{3}\right)+\dfrac{1}{3}\right]-\left(\dfrac{3}{4}+\dfrac{1}{4}\right)+\left(\dfrac{1}{5}+\dfrac{4}{5}\right)\)
\(=0-\dfrac{4}{4}+\dfrac{5}{5}\)
\(=0-1+1\)
\(=0\)
=-1/3+1/3-3/4-1/4+1/5+4/5
=-1+1
=0
Bài 1.tính nhanh
3^5.( 5^4 - 4^3 )- 5^4. ( 3^ 5 -4 ^ 3) = ?
tính nhanh
11211-1-1-1-2-2-2-2-3-3-3-4-4-4-5-5-5-6-7-7-65-4-3-2-34-5-3-3-4
11211 - 1 - 1 - 1 - 2 - 2 - 2 - 2 - 3 - 3 - 3 - 4 - 4 - 4 - 5 - 5 - 5 - 6 - 7 - 7 - 65 - 4 - 3 - 2 - 34 - 5 - 3 - 3 - 4
= 11211 - (1 + 1 + 1 + 2 + 2 + 2 + 2 + 3 + 3 + 3 + 4 + 4 + 4 + 5 + 5 + 5 + 6 + 7 + 7 + 65 + 4 + 3 + 2 + 34 + 5 + 3 + 3 + 4)
= 11211 - 190
= 11021
Thực hiện phép tính ( tính nhanh nếu có thể )
a, -5/21 + -2/21 + 8/24
b, 4/11 . -2/7 + 4/11 . -4/7 + 4/11 . -1/7
c, \(10\dfrac{5}{9}\) - ( \(3\dfrac{5}{7}\) + \(4\dfrac{5}{9}\) )
d, 1/3 + \(1\dfrac{3}{4}\) - ( \(1\dfrac{3}{4}\) - 80% )
e, \(5\dfrac{3}{5}\) + \(7\dfrac{21}{48}\) : 10/7 - \(5\dfrac{21}{48}\) : 10/7
f, -5/7 . 2/11 - 5/11 . 9/7 + \(2\dfrac{5}{7}\)
g, -3/13 . 6/8 + 7/13 . -3/8 + \(1\dfrac{3}{8}\)
a: =-1/3+1/3=0
b: \(=\dfrac{4}{11}\left(-\dfrac{2}{7}-\dfrac{4}{7}-\dfrac{1}{7}\right)=\dfrac{4}{11}\cdot\left(-1\right)=-\dfrac{4}{11}\)
c: \(=10+\dfrac{5}{9}-3-\dfrac{5}{7}-4-\dfrac{5}{9}=3-\dfrac{5}{7}=\dfrac{16}{7}\)
d: \(=\dfrac{1}{3}+\dfrac{7}{4}-\dfrac{7}{4}+\dfrac{4}{5}=\dfrac{1}{3}+\dfrac{4}{5}=\dfrac{5+12}{15}=\dfrac{17}{15}\)
a: =-1/3+1/3=0
b: =10+59−3−57−4−59=3−57=167=10+59−3−57−4−59=3−57=167
d:
12+3/7-11+3/7 tính bằng cách thuận tiện nhé
Tính nhanh 1) 1/5+3/17-4/3+(4/5-3/17+1/15) 2) (5/8-4/13+3/2)-(5/8+9/3)
1) \(\frac{1}{5}+\frac{3}{17}-\frac{4}{3}+\left(\frac{4}{5}-\frac{3}{17}+\frac{1}{15}\right)\)
\(=\frac{1}{5}+\frac{3}{17}-\frac{4}{3}+\frac{4}{5}-\frac{3}{17}+\frac{1}{15}\)
\(=\left(\frac{1}{5}+\frac{4}{5}\right)+\left(\frac{3}{17}-\frac{3}{17}\right)-\left(\frac{4}{3}-\frac{1}{15}\right)\)
\(=1+0-\frac{19}{15}\)
\(=-\frac{14}{15}\)
MÌNH
NHẦM
CHÚT
NHA
KẾT QUẢ CUỐI CÙNG LÀ:
\(-\frac{4}{15}\)
sorry!!!
Tính nhanh:
a, 1/3 . 4/5 + 1/3 * 6/5 - 4/3
b, [ -4/5 + 4/3 ] - [ -5/4 + 14/5 + 7/3]
Tính nhanh
A=2^3 - 1^4+1^5/4^3-1^2+2^5
tính nhanh
1/10 * 2/3 * 3/4 *4/5 * 5/6 * 6/5 * 5/4 * 4/3 * 3/2
kết quả của câu này là 1/10
k nha bn
tính
2/5+1/4 1/3+3/5 1/2+1/4 1/8+5/6
ai lm nhanh e tick cho
\(\dfrac{2}{5}+\dfrac{1}{4}=\dfrac{8}{20}+\dfrac{5}{20}=\dfrac{13}{20}\)
\(\dfrac{1}{3}+\dfrac{3}{5}=\dfrac{5}{15}+\dfrac{9}{15}=\dfrac{14}{15}\)
\(\dfrac{1}{2}+\dfrac{1}{4}=\dfrac{2}{4}+\dfrac{1}{4}=\dfrac{3}{4}\)
\(\dfrac{1}{8}+\dfrac{5}{6}=\dfrac{3}{24}+\dfrac{20}{24}=\dfrac{23}{24}\)
tính nhanh
1 + 1 + 2 + 2 + 3 + 3 + 4 + 4 + 5 + 5
1 + 1 + 2 + 2 + 3 + 3 + 4 + 4 + 5 + 5
= 2 + 4 + 6 + 8 + 10
= (2 + 8) + (4 + 6) + 10
= 10 + 10 + 10
= 30
= (5+1) * 2 + (2+4)*2 + 3+3 = 6*2 + 6* 2+ 6 = 6 (2+2+1) = 6 *5 = 30
1 + 1 + 2 + 2 + 3 + 3 + 4 + 4 + 5 + 5
= 2 + 4 + 6 + 8 + 10
= 6 + 6 + 8 + 10
= 12 + 8 + 10
= 20 + 10
=30
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