Tính thuận tiện a)15,27-4,18-2,09 b)45,28+52,17-15,28-12,17 c)54,27+16,9-2,27 d)7/15+7/4+8/15+5/4

Question

Tính thuận tiện
a)15,27-4,18-2,09
b)45,28+52,17-15,28-12,17
c)54,27+16,9-2,27
d)7/15+7/4+8/15+5/4

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Piper 2 tháng 2021-10-13T17:30:55+00:00 2 Answers 5 views 0

Answers ( )

    0
    2021-10-13T17:32:11+00:00

    a, 15,27 – 4,18 – 2,09 

    = ( 15,27 – 4,18 ) – 2,09

    = 11,09 – 2,09

    = 9

    b, 45,28 + 52,17 – 15,28 – 12,17

    = ( 45,28 – 15,28 ) + ( 52,17 – 12,17 )

    = 30 + 30 

    = 60

    c, 54,27 + 16,9 – 2,27

    = ( 54,27 – 2,27 ) + 16,9

    = 52 + 16,9

    = 68,9

    d, $\frac{7}{15}$  + $\frac{7}{4}$  + $\frac{8}{15}$ + $\frac{5}{4}$ 

    = ( $\frac{7}{15}$ + $\frac{8}{15}$ ) + ( $\frac{7}{4}$ + $\frac{5}{4}$ )

    = 1 + 3

    = 4

    0
    2021-10-13T17:32:17+00:00

    a)$15,27 – 4,18 – 2,09$

    $= 11,09 – 2,09$

    $=9$

    b) $45,28+52,17-15,28-12,17$

    $=45,28 – 15,28 + 52,17 – 12,17$

    $=30 + 40$

    $=70$

    c) $54,27 + 16,9 – 2,27$

    $=54,27 – 2,27 + 16,9$

    $= 52 + 16,9$

    $= 68,9$

    d) $\frac{7}{15}$ + $\frac{7}{4}$+ $\frac{8}{15}$+ $\frac{5}{4}$

    = $\frac{7}{15}$ + $\frac{8}{15}$ + $\frac{7}{4}$+ $\frac{5}{4}$

    =  $ 1 + 3$

    = $4$

    HỌC TỐT!!! 

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