2 . 53 .12 + 4 . 6 . 87 - 3 . 8 . 40
Tính nhanh
1.Tính nhanh
2*53*12+4*6*87-3*8*40
2 x 53 x 12 + 4 x 6 x 87 - 3 x 8 x 40
=(2 x 12) x 53 + (4 x 6) x 87 - (3 x 8) x 40
=24 x 53 + 24 x 87 - 24 x 40
=24 x (53 + 87 - 40)
=24 x 100
=2400
**** cho mình nha
Tính nhanh:
b) 2 . 53 . 12 + 4 . 6 . 87 - 3 . 8 . 40
b) 2 . 53 . 12 + 4 . 6 . 87 - 3 . 8 . 40
= 2 . 12 . 53 + 4 . 6 . 87 + 3 . 8 . 40
= 24 . 53 + 24 . 87 + 24 . 40
= 24 . ( 53 + 87 - 40 )
= 24 . 100
= 2400
Tính nhanh
2 x 53 x 12 + 4 x 87 x 6 - 3 x 8 x 40
tính nhanh
53* 39+47*39-53*21-47*21
2*53*12+4*6*87-3*8*40
5*7*77-7*60+49*25-15*42
53x39+47x39-53x21-47x21
=39x ( 53+47) - 21x(53+47)
=39 x100 - 21x100
= 100x(39-21)
=100x18
=1800
2x53x12 +4x6x87 - 3x8x40
= (2x12)x53 + (4x16)x87 - (3x8) x40
= 24x53 + 24x87 + 24x40
= 24( 53+87+40)
= 24x180
=4320
a,53*39+47*39-53*21-47*21
=39*[53+47]-21*[53+47]
=39*100-21*100
=3900-2100
=1800
b,2*53*12+4*6*87-3*8*40
=[2*12]*53+[4*6]*87-[3*8]*40
=24*53+24*87-24*40
=24*[53+87-40]
=24*100
=2400
tính nhanh:
a:53*39+47*39-53*21-47*21
b:2*53*12+4*6*87-3*8*40
c:5*7*77-7*60+49*25-15*42
2*53*12+4*6*87-3*8*40
2 x 53 x 12 + 4 x 6 x 87 - 3 x 8 x 40
= 2 x 12 x 53 + 4 x 6 x 87 - 3 x 8 x 40
= 24 x 53 + 24 x 87 - 24 x 40
= 24 x (53 + 87 - 40)
= 24 x (140 - 40)
= 24 x 100
= 2400
Ủng hộ mk nha ^_-
2 x 53 x 12 + 4 x 6 x 87 - 3 x 8 x 40
= 24 x 53 + 24 x 87 - 24 x 40
= 24 x ( 53 + 87 - 40 )
= 24 x 100
= 2400
2x53x12+4x6x87-3x8x40
=2x12x53+4x6x87-24x40
=24x(53+87-40)
=24x100
=2400
K cho Mk nhe!!!
2*53*12+4*6*87-3*8*40
2 x 53 x 12 + 4 x 6 x 87 - 3 x 8 x 40
= 1272 + 2088 - 960
= 3360 - 960
= 2400
2 . 53 . 12 + 4 . 6 . 87 - 3 . 8 .40
2.53.12 + 4.6.87 - 3.8.40
= 24.53 + 24.87 - 24.40
= 24.(53+87-40)
= 24.100
= 2400
minh cun g vua lam xong co giao cham dung do
2*53*12+4*6*87-3*8*40
2 x 53 x 12 + 4 x 6 x 87 - 3 x 8 x 40
= 1272 + 2088 - 960
= 2400
mình nhé! Mình nhanh nhất
\(2\times53\times12+4\times6\times87-3\times8\times40\)
\(=24\times53+24\times87-24\times40\)
\(=24\times\left(53+87-40\right)=24\times100=2400\)