Tính: 84 100 + 30 100 - 29 100
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\(\frac{84}{100}-\frac{29}{100}+\frac{30}{100}=\frac{85}{100}=\frac{17}{20}\)
85793-36841+3826=52778
325.97+86.54+103.46=515.97
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 85793 - 36841 + 3826 = 48952 + 3826 = 52778
b) \(\dfrac{84}{100}-\dfrac{29}{100}+\dfrac{30}{100}\) = \(\dfrac{55}{100}+\dfrac{30}{100}\) = \(\dfrac{85}{100}\) =\(\dfrac{17}{20}\)
c) 325,97 + 86,54 + 103,46 = 412,51 + 103,46 = 515,97
![](https://rs.olm.vn/images/avt/0.png?1311)
b, 53 + 45 + 135 + 147 + 50
= ( 53 + 147 ) + ( 45 + 135 ) + 50
= 200 + 180 + 50
= 200 + 330
= 530
b, 53 + 45 + 135 + 147 + 50
=(53+147)+(45+135+50)
=200+230
=430
![](https://rs.olm.vn/images/avt/0.png?1311)
a)85793-36841+3826=62778
b)84/100-29/100+30/100=85/100=17/50
c)325,97+86,54+103,46=515,97
d)1/2+1/3+1/4+1/5=30+20+14+12/60=76/60=19/14
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\(\dfrac{25}{100}\) + \(\dfrac{1}{4}\) x 29 + 25% \(\times\) 30 + 0,25 \(\times\) 40
= 0,25+ 0,25 x 29 + 0,25 x 30 + 0,25 x 40
= 0,25 x ( 1 + 29 + 30 + 40)
= 0,25 x 100
= 25
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134 x 100 + 250 x 100 – 84 x100.
= 100 x (134 + 250 – 84)
= 100 x 300
= 30 000
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= ( 75 : 100 ) + ( 3: 4 ) + ( 75 : 100 ) x 29 x 30 + 0,75 x 40
= 0,75 + 0,75 + 0,75 x 29 x30 + 0,75 x 40
= 0,75 x ( 29 + 30 + 40 )
= 0,75 x 100
= 75
tham khảo:
= ( 75 : 100 ) + ( 3: 4 ) + ( 75 : 100 ) x 29 x 30 + 0,75 x 40
= 0,75 + 0,75 + 0,75 x 29 x30 + 0,75 x 40
= 0,75 x ( 29 + 30 + 40 )
= 0,75 x 100
= 75
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\dfrac{75}{100}+\dfrac{3}{4}\times29+75\%\times30+0,75\times40\\ =\dfrac{75}{100}\times1+\dfrac{75}{100}\times29+\dfrac{75}{100}\times30+\dfrac{75}{100}\times40\\ =\dfrac{75}{100}\times\left(1+29+30+40\right)\\ =\dfrac{75}{100}\times100=75\)
84 100 + 30 100 - 29 100 = 84 100 + 30 100 - 29 100 = 84 100 + 1 100 = 85 100 = 17 20
=114/100-29/100=85/100 rút gọn là 17/20