tinh bang cach thuan tien 72 x2 72x3 72 x5
tinh bang cach thuan tien nhat; 476*72+476*28
476x72+476x28
=476x(72+28)
=476x100
=47 600
tinh bang cach thuan tien nhat:54×72+54×27+54
54x72+54x27+54
=54x72+54x27+54x1
=54x(72+27+1)
=54x100
=5400
Hok tốt!
54 * 72 + 54 * 27 + 54
= 54 * 72 + 54 * 27 + 54 * 1
= 54 * ( 72 + 27 + 1 )
= 54 * 100
= 5400.
54 × 72 + 54 x 27 + 54
= 54 x 72 + 54 x 27 + 54 x 1
= 54 x ( 72 + 27 + 1 )
= 54 x 100
= 5400
tinh bang cach thuan tien nhat
[72 x 135 + 9 x 28 x 15 ] : 25-3500 : 25
(72 x 135 + 9 x 28 x 15) : 25 - 3500 : 25
= [72 x 135 + 28 (9 x 15)] : 25 - 3500 : 25
= (72 x 135 + 28 x 135) : 25 - 3500 : 25
= [135 x (72 + 28)] : 25 - 3500 : 25
= [135 x 100] : 25 - 3500 : 25
= 13500 : 25 - 3500 : 25
= (13500 - 3500) : 25
= 10000 : 25
= 400
tham khảo
(72 x 135 + 9 x 28 x 15) : 25 - 3500 : 25
= [72 x 135 + 28 (9 x 15)] : 25 - 3500 : 25
= (72 x 135 + 28 x 135) : 25 - 3500 : 25
= [135 x (72 + 28)] : 25 - 3500 : 25
= (135 x 100) : 25 - 3500 : 25
= 13500 : 25 - 3500 : 25
= (13500 - 3500) : 25
= 10000 : 25
= 400
( 72 x 135 + 9 x 28 x 15 ) : 25-3500 : 25
= [ 72 x 135 + ( 9 x 15 ) x 28 ] : 25 - 3500 : 25
= ( 72 x 135 + 135 x 28 ) : 25 - 3500 : 25
= [ 135 x ( 72 + 28 ) ] : 25 - 3500 : 25
= ( 135 x 100 ) : 25 - 3500 : 25
= 13500 : 25 - 3500 : 25
= ( 13500 - 3500 ) : 25
= 10000 : 25
= 400
Bai1.Tinh bang cach thuan tien nhat :
a,72,9*99+72+0,9
b,0,8*96+1.6*2
a , 72 , 9 * 99 + 72 + 0 , 9
= 72 , 9 * 99 + 7 2 , 9
= 72 , 9 * ( 99 + 1 )
= 72 , 9 * 100
= 7290
a , 0 , 8 * 96 + 1 , 6 * 2
= 0 , 8 * 96 + 0 , 8 * 2 * 2
= 0 , 8 * 96 + 0 , 8 * 4
= 0 , 8 * ( 96 + 4 )
= 0 , 8 * 100
= 80
tinh bang cach thuan tien nhat
7 phan 11 + 3 phan 4 + 4 phan 11 + 1 phan
72 phan 99 - 28 phan 99 - 14 - 99
tinh bang cach thuan tien nhat
7 phan 11 + 3 phan 4 + 4 phan 11 + 1 phan4
72 phan 99 - 28 phan 99 - 14 phan 99
\(\frac{7}{11}+\frac{3}{4}+\frac{4}{11}+\frac{1}{4}=\left(\frac{7}{11}+\frac{4}{11}\right)+\left(\frac{3}{4}+\frac{1}{4}\right)=1+1=2\)
\(\frac{7}{11}\)+ \(\frac{3}{4}\) + \(\frac{4}{11}\) + \(\frac{1}{4}\)
= \(\left(\frac{7}{11}+\frac{4}{11}\right)\)+ \(\left(\frac{3}{4}+\frac{1}{4}\right)\)
= 1 + 1
= 2
\(\frac{72}{99}\)- \(\frac{28}{99}\) - \(\frac{14}{99}\)
= \(\frac{72}{99}\) - \(\left(\frac{28}{99}+\frac{14}{99}\right)\)
= \(\frac{72}{99}\) - \(\frac{42}{99}\)
= \(\frac{30}{99}\)
\(\frac{7}{11}+\frac{3}{4}+\frac{4}{11}+\frac{1}{4}\)
\(=\left(\frac{7}{11}+\frac{4}{11}\right)+\left(\frac{3}{4}+\frac{1}{4}\right)\)
\(=1+1=2\)
\(\frac{72}{99}-\frac{28}{99}-\frac{14}{99}\)
\(=\frac{72-24-14}{99}\)
\(=\frac{34}{99}\)
tinh bang cach thuan tien
p=3/2-5/6+7/12-9/20+11/30-13/42+15/56-17/72
ai giai tui tich
bn ơi hình như sai đề rồi , số cuối cùng là 17/72
tính bang cach thuan tien nhat
198 x 27 + 198 x 72 + 198
198×27+198×72+198
=198×27+198×72+198×1
=198×(27+72+1)
=198×100
=19800
=198x(27+72+1)
=198x100=19800
vậy..............
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