b) 25 x 20 x 125 x 8 – 8 x 20 x 5 x 125
4 x 125 x 25 x 8
2 x 8 x 50 x 25 x 125
2 x 3 x 4 x 5 x 50 x 25
25 x 20 x 125 x 8 - 8 x 20 x 5 x 125
tinh nhanh
4 x 125 x 25 x 8
2 x 8 x 50 x25 x125
2 x 3 x 4 x 5 x 50 x 25
25 x 20 x 125 x 8 - 8 x 20 x 5 x 125
4 × 125 × 25 × 8
= (4 × 25) × (125 × 8)
= 100 × 1000
= 100 000
2 × 8 × 50 × 25 × 125
= (2 × 50) × (8 × 125) × 25
= 100 × 1000 × 125
= 12 500 000
2 × 3 × 4 × 5 × 50 × 25
= (2 × 50) × (4 × 25) × (3 × 5)
= 100 × 100 × 15
= 150 000
25 × 20 × 125 × 8 - 8 × 20 × 5 × 125
= 8 × 125 × 20 × (25 - 5)
= 1000 × 20 × 20
= 400 000
- (25 x 4) x (125 x8)=100 x 1000 =100000
- (50 x 2) x (8 x 125) x 25=100 x 1000 x 25 =2500000
- (2 x 50 ) x (4 x 25) x (3 x5)=100 x 100 x 15=150000
- 25 x 20 x125 x 8 - 5
= (20 x 5) x (125 x 8) -25=100 x 1000 -5 =100000 - 5 =99995
4 *125*25*8
=4*25*125*8
=100*1000
=100000
2*8*50*25*125
=2*50*8*125*25
=100*1000*25
=2500000
2*3*4*5*50*25
=2*50*4*25*3*5
=100*100*15
=150000
25*20*125*8-8*20*5*125
=25*4*5*125*8-8*125*20*5
=100*1000*5-1000*100
=500000-100000
=400000
=
bài 1:
4 x 125 x 25 x 8 = 2 x 8 x 50 x 25 x 125 =
2 x 3 x 4 x 5 x 50 x 25 = 25 x 20 x 125 x 8 - 8 x 20 x 5 x 125 =
\(4.125.25.8\)
\(=\left(4.25\right).\left(125.8\right)\)
\(=100.1000\)
\(=100000\)
\(2.3.4.5.50.25\)
\(=\left(2.50\right).\left(4.25\right).\left(3.4.5\right)\)
\(=100.100.60\)
\(=10000.60\)
\(=600000\)
\(2.8.50.25.125\)
\(=\left(2.50\right).\left(8.125\right).25\)
\(=100.1000.25\)
\(=100000.25\)
\(=2500000\)
25 x 20 x 125 x8 - 8 x 20 x5 x 125
25 x 20 x 125 x 8 - 8 x 20 x 5 x 15
= ( 8 - 8 ) x 25 x 20 x 125 x 20 x 5 x 15
= 0 x 25 x 20 x 125 x 20 x 5 x 15
= 0 ( vì số nào nhân 0 cũng bằng 0 )
= 500\(\times\)1000\(-\)( 8\(\times\)125 ) \(\times\)( 20\(\times\)5 )
= 500\(\times\)1000\(-\)1000\(\times\)100
= 1000\(\times\)( 500\(-\)100 )
= 1000\(\times\)400
= 400000
25 x 20 x 125 x 8 - 8 x 20 x 5 x 125
= 500 x 1000 - ( 8 x 125 ) x ( 20 x 5 )
= 500000 - 1000 x 100
= 500000 - 100000
= 400000
Tính nhanh
4 x 125 x 25 x 8 2 x 8 x 50 x 25 x 125 2 x 3 x 4 x 5 x 50 x 25 25 x 20 x 125 x 8 - 8 x 20 x 5 x 125
Ai trả lời ngay và luôn mình sẽ tik cho nhười đó đầu tiên(nhớ ghi cả cách làm dduengf có mỗi đáp số nhé , mình cần gấp)
2 x 8 x 50 x 25 x 125
= ( 125 x 8 ) x ( 50 x 2 ) x 25
= 1000 x 100 x 25
=2500000
4 x 125 x 25 x 8
= ( 125 x 8 ) x ( 25 x 4 )
= 1000 x 100
=100000
2 x 3 x 4 x 5 x 50 x 25
= ( 25 x 4 ) x ( 2 x 50 ) x ( 3 x 5 )
= 100 x 100 x 15
= 150000
25 x 20 x 125 x 8 - 8 x 20 x 5 x 125
= ( 25 x 20 ) x ( 125 x 8 ) - ( 20 x 5 ) x ( 125 x 8 )
= 500 x 1000 - 100 x 1000
= 500000 - 100000
= 400000
4 x 125 x 25 x 8
= (4x25) x (125x8)
=100x1000
=100000
4 x 125 x 25 x 8
= ( 4 x 25 ) x ( 125 x 8 )
= 100 x 1000
= 100000
2 x 8 x 50 x 25 x 125
= ( 2 x 50 ) x ( 8 x 125 ) x 25
= 100 x 1000 x 25
= 100000 x 25
= 2500000
2 x 3 x 4 x 5 x 50 x 25
= ( 2 x 50 ) x ( 4 x 25 ) x 3 x 5
= 100 x 100 x 3 x 5
= 10000 x 15
= 150000
25 x 20 x 125 x 8 - 8 x 20 x 5 x 125
= ( 8 x 125 ) x 25 x 20 - ( 8 x 125 ) x ( 20 x 5 )
= 1000 x 50 - 1000 x 100
= 50000 - 100000
= - 50000
Chúc bạn hok tốt !
cho mình hỏi:
25 x 20 x 125 x 8 - 8 x 30 x 5 x125=?
GIẢI HỘ MÌNH NHÉ
\(25\times20\times125\times8-8\times30\times5\times125\\ =125\times500\times8-8\times150\times125\\ =125\times4000-1200\times125\\ =125\times\left(4000-1200\right)\\ =125\times2800\\ =350000\)
Tính nhanh: a) 2 x 3 x 4 x 5 x 50 x25 b) 25 x 20 x 125 x 8 - 8 x 20 x 5 x 125
a)=(2*50)*(4*25)*(3*5)
= 100 * 100 * 15 = 150000
a)=(2x50)x(4x25)x(3x5)
= 100x100x15=150000
b = ( 25 * 20 ) * (125 * 8 ) - ( 8 * 125 ) * ( 20 * 5 )
b = 500 * 1000 - 1000 * 100
b = 500000 - 100000
b = 400000
tim X
a,( 25 * 12 - X - 25 ) : 25 = 4
b,180 - ( X + 15 ) : X * 20 = 100
c,125 + ( X - 25 ) * 5 + X = 150
d,X : 8 * 32 + X: 3 * 18 - X: 5 *10 = 120
d, X/8*32+X/3*18-X/5*10=120
X*32/8+X*18/3-X*10/5=120
32X/8+18X/3-10X/5=120
4X+6X-2X=120
8X=120
X=120/8
X=15
a, ( 25 * 12 - X - 25 ) : 25 = 4
( 25 * 12 - x - 25 ) = 4 * 25
( 25 * 12 - x - 25 ) = 100
300 - x - 25 = 100
300 - x = 100 + 25
300 - x = 125
x = 300 - 125
x = 175
Tính bằng cách thuận tiện
35 x 20 x 5 8 x 9 x 125 25 x 7 x 4 72 : (8x3)
( 36 x 7 ) : 4
35 x 20 x 5 8 x 9 x 125 25 x 7 x 4 72:(8x3)
= 35 x ( 20 x5 ) = ( 8x125) x 9 = (25x4)x7 = 72: 24
= 35 x 100 = 1 000 x 9 = 100x7 = 3
= 3 500 = 9 000 =700
(36x7):4
=36: 4 x 7
= 9 x7
= 63
35 x 20 x 5 = 35\(\times\)(20 \(\times\)5)= 35 \(\times\)100=3500
8 \(\times\)9 \(\times\) 125 =(8\(\times\) 125)\(\times\)9=1000\(\times\)9=9000
25 \(\times\)7\(\times\)4=(25 \(\times\)4)\(\times\)7=100\(\times\)7=700
72 : (8\(\times\)3)=72 : 8 x 3 =(72:8) x 3=9 x 3=27
(36 x 7) : 4 =36 x 7 : 4 =7 x (36 :4)=7 x 9=63