Tính: a) A= 3687 + 9541 + 6313 +459 b) B= 387.2694+7305.387+387 c) C=5871:[928-(247-82).5] d) D= 248: {[(368+232):120-3] +122 + 2006

Question

Tính:
a) A= 3687 + 9541 + 6313 +459
b) B= 387.2694+7305.387+387
c) C=5871:[928-(247-82).5]
d) D= 248: {[(368+232):120-3] +122 + 2006

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Orla Orla 1 year 2020-11-06T00:57:41+00:00 2 Answers 81 views 0

Answers ( )

    0
    2020-11-06T00:58:47+00:00

    a , 

    A = 3687 + 9541 + 6313 + 459 = ( 3987 + 6313 ) + ( 9541 + 459 ) = 10300 + 10000 = 20300

    b, 

    B = 387 . 2694 + 7305 . 387 + 387 = 387 . ( 2694 + 7305 + 1 ) = 387 . 10000 = 3870000

    c, 

     C = 5871 : [ 928 – ( 247 – 82 ) . 5] = 5871 : [ 928 – 165 . 5] = 5871 : [ 928 – 825 ] = 5871 : 103 

    = 57 

    d, 

    D= 248 : {[( 368 + 232 ) : 120 – 3 ] +122 + 2006 }

    = 248 : {[600 : 120 – 3 ] +122 + 2006 }

    = 248 : {[5- 3 ] +122 + 2006 }

    = 248 : {2+122 + 2006 }

    = 248 : 2130 = $\frac{124}{1065}$ 

    0
    2020-11-06T00:59:22+00:00

    a)
    3687+9541+6313+459
    (3687+6313)+(9541+459)
    =10 000+10 000
    =20 000

    b)
    387.2694+7305.387+387
    = 387.2694+7305.387+387.1
    =387.(2694+7305+1)
    =387.10 000
    =3 870 000

    c)
    5871:[928-(247-82).5]
    =5871:[928-165.5]2
    =5871:[928-825]
    =5871:103
    =57

    d)
    248:{[(368+232):120-3]+122+2006}
    =248:{[600:120-3]+122+2006
    =248:{[5-3]+122+2006
    =248:{2+122+2006}
    =248:{124+2006}
    =248:2130
    =124 / 1065

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