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5 x 217 x 20 - 4 x 215 x 25
= 1085 x 20 - 4 x 215 x 25
= 21700 - 4 x 215 x 25
= 21700 - 860 x 25
= 21700 - 21500
= 200
\(5.217.20-4.215.25\)
\(=\left(5.20\right).217-\left(4.25\right).215\)
\(=100.217-100.215\)
\(=100.\left(217-215\right)\)
\(=100.2=200\)
Nhớ k cho mình nhé! thank you!!!
18*(5773+2457)+5310*6
=18 *8230+53108*6
=18*(8230+53108)*6
=18*61238*6
=11102184*6
=6613104
k cho mình nha
4x113x25-5x112x20
=100x113-100x112
=100x(113-112)
=100x1
=100
k tôi nhá bn
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
2/3 x 3/4 x 4/5 : 1/5 = 6/12 x 4/5 :1/5 = 24/60 :1/5 = 4/10 : 1/5 = 4/10 x 5/1 = 20/10 = 2
2/5 x 3/4 x 5/6 : 3/4 = 6/20 x 5/6 : 3/4 = 3/10 x 5/6 : 3/4 = 15/60 : 3/4 = 1/4 : 3/4 = 1/4 x 4/3 = 4/12 = 1/3
k cho mk nha!
1000 + x = 20 + 20
1000 + x = 40
x = 1000 - 40
x = 960
tính nhanh
50 x 2 + 50 x 2 = 200
\(1000+x=20+20\)
\(1000+x=40\)
\(x=40-1000\)
\(x=-960\)
\(50x2+50x2\)
\(=50x\left(2+2\right)\)
\(=50x4\)
\(=200\)
\(K\)\(nha\)\(ban!!!\)
5 x 217 x 20 - 4 x 215 x 25
= ( 5 x 20 ) x 217 - ( 4 x 25 ) x 215
= 100 x 217 - 100 x 215
= 100 x ( 217 - 215 )
= 100 x 2
= 200
5 x 217 x 20-4 x 215 x 25
=(5 x 20) x 217-(4 x 25) x 215
=100 x 217-100 x 215
=100 x (217-215)
=100 x 2
=200