tính 419 + 87 / 2564 + 323
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a). 67 + 135 + 33
= ( 67 + 33 ) + 135
= 100 + 135
= 235
b). 277 + 113 + 323 + 87
= ( 277 + 323 ) + ( 113 + 87 )
= 600 + 200
= 800
hok tốt nha bạn
a) 67 + 135 + 33
= (67 + 33) +135
= 100 + 135
= 235
b) 277 +113 +328 +87
= (277 + 323) + (113 + 87)
= 600 + 200
= 800
k cho mk nha
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a,92+(-102)=-(102-92)=-10(số nào lớn thì lấy dấu số đó)
b,(-105)+87=-(105-87)=-18
c,312+(-419)=-(419-312)=-107
d,67-349=67+(-349)=-282
a, -(102 - 92) = ( - 10 )
b, - ( 105 - 87) = -18
c, -(419 - 312)= -107
d, 67 - 349 =-282
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a) 67+135+33=(67+33)+135=100+135=235
b) 227+113+323+87=(227+323)+(113+87)=550+200=700
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Đáp án :
4 . 37 . 25
= 4 . 25 . 37
= 100 . 37
= 3700
27+113+323+87
=( 113 + 87 ) + ( 27 + 323 )
= 200 + 350
= 550
~ hok tot~!
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a)419 x 2 + 419 x 3 + 419 x 5
= 419 x ( 2 + 3 + 5 )
= 419 x 10
= 4190
b) 7020 x 7 - 7020 x 3 - 7020 x 4
= 7020 x ( 7 - 3 - 4 )
= 7020 x 1
= 7020
a, 419 x ( 2 + 3 +5)
= 419 x 10 = 4190.
b, 7020 x ( 7 - 3 - 4)
= 7020 x 0 = 0.
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\(\frac{5}{6}+\frac{7}{12}=\frac{10}{12}+\frac{7}{12}=\frac{17}{12}\)
\(3+\frac{5}{7}=\frac{21}{7}+\frac{5}{7}=\frac{26}{7}\)
(689+875)+125=689+875+125=689+1000=1689
581+(878+419)=581+878+419=581+419+878=1000+878=1878
5,87+28,69+4,13=5,87+4,13+28,69=10+28,69=38,69
83,75+46,98+6,25=83,75+6,25+46,98=90+46,98=136,98
5/6 + 7/12 = 17/12
3 + 5/7 = 26/7
926,83 + 549,67 = 1476.5
(689 + 875) + 125 = 689 + (875 + 125) = 1689
581 + (878 + 419) = (581 + 419) + 878 = 1878
5,87 + 28,69 + 4,13 = (5,87 + 4,13) + 28,69 = 38,69
83,75 + 46,98 + 6,25 =( 83,75 + 6,25) + 46,98 = 136,98