1)(5 8/9:1 17/36+1 1/4 ) * 5/21=?
2)(-1 3/8-2 5/12): 5 5/12=?
РЕШИТЕ ПОЖАЛУЙСТА ПО ДЕЙСТВИЯМ)
2)(-1 3/8-2 5/12): 5 5/12=?
РЕШИТЕ ПОЖАЛУЙСТА ПО ДЕЙСТВИЯМ)
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2) 4 +1 1/4 =5 1/4 = (5*4+1)/4 =21/4.
3) 21/4*5/21 = (21*5)/(4*21) =5/4 или по другому 1 1/4 .
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2) (-1 3/8-2 5/12): 5 5/12=?
1) - 1 3/8 -2 5/12 = -3 (3*3+5*2)/24 = -3 19/24.
2) -3 19/24. : 5 5/12 = -(3*24+19)/24 : (5*12+5)/12 = -91/24 : 65/12 = -(91*12/24*65)=
= - (13*7*12 /2*12*13*5) = -7/10 или по другому -0,7.
(212/36:53/36+45/36)*5/21=(212/53+5/4)*5/21=(4+5/4)*5/21=20/21+(5*5)/(4*21)=(20*4+5*5)/(4*21)=(80+25)/84=105/84=1, 25 или 1 цел и 1/4
2) {-(1*3*8+3*3)/24 - (2*2*12+5*2)/24)}:(5*12*2+5*2)/24=( -33/24-58/24 ) : (130/24)= (- 91/24):(130/24)= -91/130 = -0,7