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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: RÚT GỌN PHÂN SỐ A = 9×11+32×9 PHẦN 23×15+12×23 B =10×11+50×55+70×77 PHẦN 10×12+55×60+77×84

Toán Lớp 6: RÚT GỌN PHÂN SỐ
A = 9×11+32×9 PHẦN 23×15+12×23
B =10×11+50×55+70×77 PHẦN 10×12+55×60+77×84

Comments ( 2 )

  1. Giải đáp + Lời giải và giải thích chi tiết:

    A=(9xx11+32xx9)/(23xx15+12xx23)

    A=(9xx(11+32))/(23xx(15+12))

    A=(9xx43)/(23xx27)

    A=(1xx43)/(23xx3)

    A=43/69

    $\\$

    B=(10xx11+50xx55+70xx77)/(10xx12+55xx60+77xx84)

    B=(10xx11+5xx10xx5xx11+7xx10xx7xx11)/(10xx12+5xx11xx12xx5+7xx11xx12xx7)

    B=(10xx11+25xx10xx11+49xx10xx11)/(10xx12+11xx12xx25+49xx11xx12)

    B=(10xx11xx(1+25+49))/(10xx12+11xx12xx(25+49)

    B=(10xx11xx75)/(10xx12+11xx12xx74)

    B=(10xx11xx75)/(12xx(10+11xx74))

    B=(10xx825)/(12xx824)

    B=(5xx825)/(6xx824)

    B=4125/4944

    B=1375/1648

  2. $ A = \dfrac{9.11+32.9}{23.15+12.23} = \dfrac{9.(32+11)}{23.(15+12)}=\dfrac{9.43}{23.27} = \dfrac{9.43}{23.3.9} = \dfrac{43}{69} $

    $ B = \dfrac{10.11+50.55+70.77}{10.12+55.60+77.84} = \dfrac{10.11+5.10.111+7.10.11}{11.12+5.11.12+7.11.12} = \dfrac{10.11(1+55+7)}{11.12(1+5+7)}=\dfrac{10.63}{12.13} =\dfrac{630}{156}=\dfrac{105}{26}  $

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222-9+11+12:2*14+14 = ? ( )