tinh bang cach thuan tien nhat; 25*1357*4; giai ho yui nha
TINH BANG CACH THUAN TIEN NHAT
\(\dfrac{1}{3}+\dfrac{6}{5}-\dfrac{1}{5}+\dfrac{2}{3}=2\)
tinh bang cach thuan tien nhat: 2,5x12,5x8x0,4
2,5 x 12 ,5 x 8 x 0,4=(2,5 x 0,4 ) x(12,5 x8)
=1x100=100
=2,5 x 12,5 x 8 x 0,4
=(2,5 x 0,4) x (12,5 x 8)
=1 x 100
=100
Tính bằng cách thuận tiện nhất: 2,5x12,5x8x0,4=100
k mik nha
tinh bang cach thuan tien nhat phep tinh 1212/1515
1212/1515 = 1212 :1515
= 12 x 101 : 15 x 101
= 12/15
dinh hoang vu
\(\frac{1212}{1515}=\frac{1212\div101}{1515\div101}\)
\(=\frac{12}{15}=\frac{4}{5}\)
\(\frac{1212}{1515}=\frac{2^2.3.101}{3.5.101}=\frac{2^2}{5}=\frac{4}{5}\)
Tinh bang cach thuan tien nhat:25x20x125x8-8x20x5x125
25x20x125x8-8x20x5x125
=(25x8)x(20x125)-(20x5)x(8x125)
=200x2500-100x1000
=500000-100000=400000
mk tính giống bạn kia
tinh bang cach thuan tien nhat; 476*72+476*28
476x72+476x28
=476x(72+28)
=476x100
=47 600
tinh bang cach thuan tien nhat; 54*342-44*342
54x342-44x342
=342x(54-44)
=342x10
=3 420
tinh bang cach thuan tien nhat a) 48,25+12,72+51,75+87,28=??
48,25 + 12,72 + 51,75 + 87,28
= (48,25 + 51,75) + (12,72 + 87,28)
= 100 + 100
= 200
a) 48,25+12,72+51,75+87,28
= (48,25+51,75) + (12,72+ 87,28)
= 100 + 100
= 200
tinh bang cach thuan tien nhat 5,6x2+2,8+11,2x2-48,5
tinh bang cach thuan tien nhat : 742+316+258
tinh bang cach thuan tien nhat:1+8+29+32
1 + 8 + 29 + 32
= ( 1 + 29 ) + ( 8 + 32)
= 30 + 40
= 70
mk nhóa
\(1+8+29+32\)
\(=\left(1+29\right)+\left(8+32\right)\)
\(=30+40\)
\(=70\)