Phạm Tú Anh
Giới thiệu về bản thân
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2022-07-13 15:43:15
a) 23.54−34.23\dfrac{2}{3}.\dfrac{5}{4}-\dfrac{3}{4}.\dfrac{2}{3}
2/3.(5/4-3/4)
=2/3.1/2
=3
b) 2.(−32)2−722.\left(\dfrac{-3}{2}\right)^2-\dfrac{7}{2}
=-3-
2022-07-13 15:35:17
2022-07-13 15:34:42
b,2.(−32)−72=−6.12−7.12=(−6−7).12=−13.12=−132b,2.\left(\dfrac{-3}{2}\right)-\dfrac{7}{2}=-6.\dfrac{1}{2}-7.\dfrac{1}{2}=\left(-6-7\right).\dfrac{1}{2}=-13.\dfrac{1}{2}=\dfrac{-13}{2}
c,−34.5313−0,75.3613=−34.(6813−3613)=−34.3213=−2413c,-\dfrac{3}{4}.5\dfrac{3}{13}-0,75.\dfrac{36}{13}=-\dfrac{3}{4}.\left(\dfrac{68}{13}-\dfrac{36}{13}\right)=-\dfrac{3}{4}.\dfrac{32}{13}=-\dfrac{24}{13}
2022-07-13 15:34:09
a) 23.54−34.
=
2022-07-12 21:25:18
1:vẽ
2022-04-18 22:31:58
A) 1/3+3/4-5/6
=4/12+9/12-10/12
=13/12-10/12
=3/12=1/4
