Tính: (3−5).(30−21)=\Big( \dfrac{3}{-5} \Big) . \Big( \dfrac{30}{-21} \Big)=(−53).(−2130)=
Tính
58.−2420=\dfrac{5}{8}.\dfrac{-24}{20}=85.20−24=
2−5:−640\dfrac{2}{-5}:\dfrac{-6}{40}−52:40−6.
Tính:
8−3:246\dfrac{8}{-3}:\dfrac{24}{6}−38:624 =
(−5).59(-5).\dfrac{5}{9}(−5).95
8−9.(−2)=\dfrac{8}{-9}.(-2)=−98.(−2)=
−2:56=-2:\dfrac{5}{6}=−2:65=
2−7:4=\dfrac{2}{-7}:4=−72:4=
(−434).0,4=\left(-4\dfrac{3}{4}\right).0,4=(−443).0,4=
(−334):(−0,4)=\left(-3\dfrac{3}{4}\right):\left(-0,4\right)=(−343):(−0,4)=
−34.12−5.(−256)=\dfrac{-3}{4}.\dfrac{12}{-5}.\left(-\dfrac{25}{6}\right)=4−3.−512.(−625)=
(−2).−3821.−74.(−38)=\left(-2\right).\dfrac{-38}{21}.\dfrac{-7}{4}.\left(-\dfrac{3}{8}\right)=(−2).21−38.4−7.(−83)=
(−23+37):45+(−13+47):45=\left(\dfrac{-2}{3}+\dfrac{3}{7}\right):\dfrac{4}{5}+\left(\dfrac{-1}{3}+\dfrac{4}{7}\right):\dfrac{4}{5}=(3−2+73):54+(3−1+74):54=
59:(111−522)+59:(115−23)=\dfrac{5}{9}:\left(\dfrac{1}{11}-\dfrac{5}{22}\right)+\dfrac{5}{9}:\left(\dfrac{1}{15}-\dfrac{2}{3}\right)=95:(111−225)+95:(151−32)=
Chọn đáp án đúng:
(1112:−3316).35=\left(\dfrac{11}{12}:\dfrac{-33}{16}\right).\dfrac{3}{5}=(1211:16−33).53=
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