Tinh bang cach thuan tien
4.5+1.8+2.1+...+4.5+4.8
tinh gia tri bieu thuc 1.5 + 1.8 +2.1 + ............................+4.5 +4.8
tinh bang cach thuan tien nhat
4.8 x 13.5 - 2.5 x 4.8 - 4.8
= 4,8 x 13,5 - 2,5 x 4,8 - 4,8 x 1
= 4,8 x (13,5 - 2,5 - 1)
= 4,8 x 10
= 48
Chúc bạn học tốt.
4,8 \(\times\) ( 13,5 - 2,5-1 )
= 4,8 \(\times\) 10
= 48
tinh bawng cach thuan tien
4.5 * 16 - 1.7
4.5 * 15 + 2.8
\(\frac{4,5\times16-1,7}{4,5\times15+2,8}=\frac{4,5\times15+4,5-1,7}{4,5\times15+2,8}\)
\(=\frac{4,5\times1,5+2,8}{4,5\times1,5+2,8}\)
\(=1\)
\(\frac{4,5.16-1,7}{4,5.15+2,8}\)
\(=\frac{4,5.15+4,5-1,7}{4,5.15+2,8}\)
\(=\frac{4,5.1,5+2,8}{4,5.1,5+2,8}\)
\(=1\)
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 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 2x3x4x5
2 x 3 x 4 x 5
= 6 x 20
= 120
=[ 2 x 5 ] x [ 3 x 4 ]
= 10 x 12
= 120
tinh bang cach thuan tien
5,65x13,8+35,7x3,21+5,56x21,9+35,7x1,14
\(5,65\cdot13,8+35,7\cdot3,21+5,56\cdot21,9+35,7\cdot1,14\)
\(=5,65\left(13,8+21,9\right)+35,7\left(3,21+1,14\right)\)
\(=5,65\cdot35,7+35,7\cdot4,35\)
\(=35,7\left(5,65+4,35\right)\)
\(=35,7\cdot10=357\)
Tinh bang cach thuan tien 50056456+56442424455x2
50056456+(56442424455x2)=50056456+112884848910
=112934905366
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