\(\dfrac{3}{7}.\dfrac{9}{36}-\dfrac{1}{14}.\dfrac{1}{13}\)
\(=\dfrac{3.9}{7.36}-\dfrac{1.1}{14.13}\)
\(=\dfrac{3}{28}-\dfrac{1}{182}=\dfrac{37}{364}\)
3/7 . 9/36 - 1/14 . 1/13
= 3/28 - 1/182
= 37/364
\(\dfrac{3}{7}.\dfrac{9}{36}-\dfrac{1}{14}.\dfrac{1}{13}\)
\(=\dfrac{3.9}{7.36}-\dfrac{1.1}{14.13}\)
\(=\dfrac{3}{28}-\dfrac{1}{182}=\dfrac{37}{364}\)
3/7 . 9/36 - 1/14 . 1/13
= 3/28 - 1/182
= 37/364
Bt1 Tính hợp lí
a) 3/7.9/26-1/14.1/13
b)3/5.13/46-1/10.16/23
3/7.9/26-1/14.1/13
( / là phân số, . là dấu nhân)
Mình gấp nhé
3/7.9/26-1/14.1/13
/ là phân số, . là dấu nhân
Cụ thể và là nhanh nhất nhé các bạn
8)Tính nhanh :
a) -3/7+5/13+ -4/7
b)-5/8+3/4+ -1/5+-3/8+1/4
c)6/7.8/13+6/7.9/13+ -3/13.6/7
d)-5/7.2/11+ -5/7.9/11+1 5/7
e)11 3/13 - (2 4/7+5 3/13)
f) (1-1/2)(1-1/3)(1-1/4)(1-1/5)
a,3/2-5/6:(1/2)2+\(\sqrt{0,25-\sqrt{\dfrac{1}{4}}}\)
b,-4/3:2/9+13/12:-13/8
c,(-1/2)2-[-1/6:|-1+5|-\(\sqrt{64}.\left(\dfrac{1}{4}\right)^2\)
d,15^11.5^7.9^2/5^18.27^6
Rút gọn \(\frac{2^{13}.3^7}{4^7.9^3}\)
\(\frac{0.6^5}{0.2^6}\)
\(\frac{2^7.9^3}{6^5.8^2}\)
\(\frac{6^3}{-13}+3.6^2+3^3\)
tính
a.\(\frac{2^7.9^3}{6^5.8^2}\)
b.\(\frac{6^3+3.6^2+3^3}{-13}\)
\(\frac{2^7.9^3}{6^5.8^2}\)
\(\frac{6^3+3.6^2+3^3}{-13}\)