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=(5016+912). 37 : 13 : 74
=5928.37 : 13 : 74
=219336 : 13 : 74
=16872:74
=2410
(456.11+912).37:13:74
= (456.11+912):13:(74:37)
= (456.11+456.2):13:2
= 456.(11+2):13:2
= 456.13:13:2
= (456:2).(13:13)
= 228.1
= 228
a)
\(5dm=\dfrac{5}{10}m=0.5m\)
\(15cm=\dfrac{15}{100}m=0.15m\)
b)
\(1h12'=1\dfrac{1}{5}h=\dfrac{6}{5}h\)
\(2h15'=2\dfrac{1}{4}h=\dfrac{9}{4}h\)
a,5 dm=\(\dfrac{5}{10}m=0,5m\);\(15cm=\dfrac{15}{100}m=0,15m\).
b,\(1h12p=1\dfrac{1}{5}h=\dfrac{6}{5}h\);\(2h15p=2\dfrac{1}{4}h=\dfrac{9}{4}h\).
a/ \(\dfrac{2}{3}.\dfrac{3}{4}.\dfrac{4}{5}=\dfrac{2.3.2.2}{3.2.2.5}=\dfrac{2}{5}\)
b/ \(\dfrac{1}{2}:\dfrac{3}{4}:\dfrac{5}{6}=\dfrac{2}{1}.\dfrac{4}{3}.\dfrac{6}{5}=\dfrac{2.2.2.2.3}{1.3.5}=\dfrac{16}{5}\)
\(3dm=\frac{3}{10}m=0,3m\)
\(85cm=\frac{85}{100}m=0,85m\)
\(52mm=\frac{52}{1000}m=0,052m\)
1 đúng nhé!
\(\frac{15}{37}\)x \(\left(\frac{38}{41}-\frac{74}{45}\right)-\frac{38}{41}\)x \(\left(\frac{15}{37}+\frac{82}{76}\right)\)
\(=\frac{15}{37}\)x \(\frac{38}{41}-\frac{15}{37}\)x \(\frac{74}{45}-\frac{38}{41}\)x \(\frac{15}{37}-\frac{38}{41}\)x \(\frac{82}{76}\)
\(=\frac{15}{37}\)x \(\frac{38}{41}-\frac{2}{3}-\frac{38}{41}\)x \(\frac{15}{37}-1\)
\(=\frac{15}{37}\)x \(\frac{38}{41}\)\(-\frac{38}{41}\)x \(\frac{15}{37}\)\(-\frac{2}{3}-1\)
\(=0-\frac{2}{3}-1=\frac{-5}{3}\)
\(42.53+47\left(156+114\right)\)
\(42.53+47.270\)
\(hixx\)\(\text{quên ùi}\)
hhhhhhhhhhhhhhhhh
42 x 53 + 47 x 156 + 47 x 114
= 42 x 53 + 47 x ( 156 + 114 )
= 42 x 53 + 47 x 270
= 2226 + 12690
= 14916