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\(\dfrac{3.5}{8.24}=\dfrac{3.5}{8.3.8}=\dfrac{5}{64}\)
Chúc bạn học tốt
\(\frac{3.5}{8.24}=\frac{3.5}{2^3.2^3.3}=\frac{1.5}{8.8.1}=\frac{5}{64}\)
\(\frac{2.14}{7.8}=\frac{2.7.2}{7.2^3}=\frac{1.7}{7.2}=\frac{1}{2}\)
\(\frac{3.7.11}{22.9}=\frac{1.7.11}{11.2.3}=\frac{1.7.1}{1.2.3}=\frac{7}{6}\)
\(\frac{8.5-8.2}{16}=\frac{8\left(5-2\right)}{8.2}=\frac{8.3}{8.2}=\frac{1.3}{1.2}=\frac{3}{2}\)
\(\frac{11.4-11}{2-13}=\frac{11\left(4-1\right)}{-11}=\frac{11.3}{-11}=-3\)
Bài 17 (Sgk Toán 6 Trang 15)
a) 3.5/8.24=3.5:3/8.24:3=5/8.8=5/64.
b) 2.14/7.8=2.2.7/7.2^3=2.7/7.4=1/2.
c) 3.7.11/22.9=3.7.1/12.11.3^2=7/2.3=76.
d) 8.5−8.2/16=(8.5−8.2):8/16:8=5−2/2=32.
e) 11.4−11/2−13=11.4−11/−11=(11.4−11):11/−11:11=4−1/−1=−3/1=-3
(-2)^3.3^3.5^3.7.8/3.5^3.2^4.42
=(-2)^2.(-2).3^3.5^3.7.8/3.5^3.2^2.2^2.7.6
=4.(-2).3^3.5^3.7.8/3.5^3.4.4.7.6
=-1.3^2.8/6
=-72/6=-12
\(\frac{\left(-2\right)^3.3^3.5^3.7.2^3}{3.5^3.2^4.2.3.7}\)=\(\frac{\left(-2\right)^2.\left(-2\right).3^3.5^3.7.2^3}{3^2.5^3.2^5.7}\)=\(\frac{2^5.\left(-2\right).3}{2^5}\)=\(-6\)
Ta có:
\(\frac{\left(-2\right)^3.3^3.5^3.7.8}{3.5^3.2^4.42}=\frac{\left(-2\right).\left(-2\right).\left(-2\right).3.3.3.5.5.5.7.2.2.2}{3.5.5.5.2.2.2.2.2.3.7}\)
\(=\frac{\left(-2\right)}{1}=-2\)
a; \(\dfrac{3.5}{8.24}\) = \(\dfrac{3.5}{8.3.8}\) = \(\dfrac{5.3:3}{8.8.3:3}\) = \(\dfrac{5}{64}\)
b; \(\dfrac{8.6}{9.32}\)= \(\dfrac{8.2.3}{3.3.8.2.2}\) = \(\dfrac{8.2.3:\left(8.2.3\right)}{3.2.8.2.3:\left(8.2.3\right)}\) = \(\dfrac{1}{3.2}\) = \(\dfrac{1}{6}\)
b; \(\dfrac{6.5.12}{20.15}\) = \(\dfrac{6.5.4.3}{4.5.3.5}\) = \(\dfrac{6.3.4.5:\left(3.4.5\right)}{5.3.4.5:\left(3.4.5\right)}\) = \(\dfrac{6}{5}\)
\(\frac{3\times5}{8\times24}\)= \(\frac{15}{192}\)= \(\frac{15:3}{192:3}\)= \(\frac{5}{64}\)
\(\frac{3.5}{8.24}\)=\(\frac{15}{192}\)=\(\frac{5}{64}\)
kb nha