2168 hm + 875hm : 5 2367dam × 3 – 4864 dam
4728 – 476 × 6 (3145 – 1967) × 4
Tính
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a: 14/5-7/5=7/5
b: 7/8-1/3+5/4
=21/24-8/24+30/24
=43/24
c; =7/6+5/6+2/15+13/15
=2+1
=3
d: =4*5/3*11=20/33
e: =2/9*1/6*1/4=2/9*1/24=1/108
2:
a: \(=\dfrac{3}{9}\cdot\dfrac{4}{4}\cdot\dfrac{5}{5}\cdot\dfrac{6}{6}\cdot\dfrac{7}{7}=\dfrac{1}{3}\)
b: \(=\dfrac{1}{6}\left(\dfrac{22}{3}-\dfrac{2}{3}\right)=\dfrac{10}{3}\cdot\dfrac{1}{6}=\dfrac{10}{18}=\dfrac{5}{9}\)
c; \(=\dfrac{1}{3}\left(9-\dfrac{2}{5}-\dfrac{3}{5}\right)=\dfrac{8}{3}\)
2168 m = 2,168 7,84 hm = 784 m
5,68 km = 5680 m 3681 m = 3,681 km
26 m = 2,6 0,05 m = 50 mm
mih ko biết đúng hay ko
2168m=2,168km
7,84hm=784m
5,68km=5680m
3681m=3,681km
26m=2,6dâm
0,05m=50mm
\(A=cos\left(\alpha+\dfrac{\pi}{6}\right)cos\left(\alpha-\dfrac{\pi}{6}\right)=\dfrac{1}{2}\left[cos\left(\alpha+\dfrac{\pi}{6}+\alpha-\dfrac{\pi}{6}\right)+cos\left(\alpha+\dfrac{\pi}{6}-\alpha+\dfrac{\pi}{6}\right)\right]\)
\(=\dfrac{1}{2}\left(cos2\alpha+cos\dfrac{\pi}{3}\right)=\dfrac{1}{2}\left(\dfrac{1}{4}+\dfrac{1}{2}\right)=\dfrac{3}{8}\)
2168hm + 875hm :5 =2343 hm
4728-476x6=1872
2367dam x 3 -4864 dam =2237 dam
{3145 - 1967 } x 4=4712
vote chi nha