a)85.(47-29)+29.(85-47).b)(-47).69+31.(-47).c)44.(-50)-50.56 02/11/2021 Bởi Reagan a)85.(47-29)+29.(85-47).b)(-47).69+31.(-47).c)44.(-50)-50.56
Đáp án: Giải thích các bước giải: `a)85.(47-29)+29.(85-47)` `=85.47-85.29+29.85-29.47` `=(85.47-29.47)+(29.85-85.29)` `=47.(85-29)` `=47.56=2632` `b)(-47).69+31.(-47)` `=(-47).(69+31)` `=(-47).100=-4700` `c)44.(-50)-50.56` `=(-44).50-50.56` `=50.[(-44)-56]` `=50.(-100)=-5000` Bình luận
${ a)85.(47-29)+29.(85-47)}$ ${ = 85.47-85.29+29.85-29.47}$ ${ = 47.(85-29)+85.29.(-1+1)}$ ${ = 47. 56 +0}$ ${ = 2532}$ ${b)(-47).69+31.(-47)}$ ${ = (-47).(69+31)}$ ${ = -47.100}$ ${ = -4700}$ ${ c)44.(-50)-50.56}$ ${ = (-50).(44+56)}$ ${ = -50 . 100}$ ${ = -5000}$ Bình luận
Đáp án:
Giải thích các bước giải:
`a)85.(47-29)+29.(85-47)`
`=85.47-85.29+29.85-29.47`
`=(85.47-29.47)+(29.85-85.29)`
`=47.(85-29)`
`=47.56=2632`
`b)(-47).69+31.(-47)`
`=(-47).(69+31)`
`=(-47).100=-4700`
`c)44.(-50)-50.56`
`=(-44).50-50.56`
`=50.[(-44)-56]`
`=50.(-100)=-5000`
${ a)85.(47-29)+29.(85-47)}$
${ = 85.47-85.29+29.85-29.47}$
${ = 47.(85-29)+85.29.(-1+1)}$
${ = 47. 56 +0}$
${ = 2532}$
${b)(-47).69+31.(-47)}$
${ = (-47).(69+31)}$
${ = -47.100}$
${ = -4700}$
${ c)44.(-50)-50.56}$
${ = (-50).(44+56)}$
${ = -50 . 100}$
${ = -5000}$