Tính hợp lí: -29(85-47)-85(47-29)
tính hợp lí
a)29.(85-47)+85.(47-29)
b)47.(23+50)-23.(47+50)
a) 29.(85-47)+85.(47-29)= 29.85-29.47+85.47-85.29
=(29.85-85.29) -29.47+85.47
=0-29.47+85.47
= -29.47+85.47
= (-29+85).47
=56.47
= 2632
b)47.(23+50)-23.(47+50)= 47.23+47.50-23.47+23.50
=(47.23-23.47)+47.50+23.50
=0+47.50+23.50
=47.50+23.50
=(47+23).50
=70.50
=3500
tích ^.^ ~
a) 29.(85-47)+85(47-29)
=29.38+85.18
=1102+1520
=2622
b)47.(23+50)-23.(47+50)
=47.73-23.97
=3431-2231
=1200
k mình nha...^_^...kb nữa... thanks
Tính hợp lí:
a. -29.(85-47)-85.(47-29)
b. 37.(29-23)-29.(37-23)
c. 5.2004-1002.(-10)+40.501
tính nhanh:
29.(85-47)+85.(47-29)
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CẢM ƠN !!!
29.(85-47)+85.(47-29)
=29.85 - 29.47 + 85.47 -85.29
=29.(85-85) + 47.(85-29)
=2632
29.(85-47)+85.(47-29)
=29.85 - 29.47 + 85.47 - 85.29
=29.(85-85) + 47.(85-29)
=0+2520
=2520
29.(85-47)+85.(47-29)
=29.85-29.47+85.47-85.29
=47.(85+29)
=47.114=114
(-29).(85-47)-85.(47-29)
29( 85 - 47 ) + 85( 47 - 29 )
29(85 - 47) + 85(47 - 29)
= 29.85 - 29.47 + 85.47 - 85.29
= (29.85 - 85.29) - (29 . 47 - 85.47)
= - 47.(29 - 85)
= -47.(-56 ) = 2632
29( 85 - 47 ) + 85( 47 - 29 )
= 29 . 85 - 29 . 47 + 85 . 47 - 85 .29
= -29 . 47 + 85 . 47
= 47(- 29 + 85 )
= 47 . 56 = 3136
\(29(85-47)+85(47-29)\)
\(=29\cdot85-29\cdot47+85\cdot47-85\cdot29\)
\(=(29\cdot85-85\cdot29)-(29\cdot47-85\cdot47)\)
\(=0-\left[29-85\right]\cdot47=0-(-2536)=2536\)
(-29).(85-47)-85.(47-29)
(-29).(85-47)-85.(47-29)
=(-29).38-85.18
=-1102-1530
=-2632
cam on ban nh a :>
-29 * ( 85 -47) -85 * (47-29)
-167 * (67 -34) - 67 * (34 -467)
(-29).(85-47)-85.(47-29)
=(-29).85+29.47-85.47+85.29
=85.[(-29)+29]+47.(29-85)
=85.0+47.(-56)
=0+(-2632)
(-167) . (67-34) - 67 . ( 34- 167)
=-167.67+167.34 - 67.34+67.167
=167.34-67.34
=34.(167-67)
=34.100=3400
B1/ Tính nhanh :
a/ -29.(85-47)-85.(47-29)
b/ -15 . (23-29)+23.(15-29)
c/ 13. (55-29)+23.(15-29)
giải giúp mik nha
tính hợp lí giúp mình nha:
29.(85-47)+85.(47-29)
29.(85-47)+85.(47-29)
29x(85-47)+85x(47-29)
29x38+85x18
1102+1530+
=2632
Chúc bạn may mắn!
29.(85-47)+85.(47-29)
=29.85-29.47+85.47-85.29
=29.85-85.29+85.47-29.47
=0+47.(85-29)
Tới đây tự làm nhé!