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You can see that the three digits followed by 672 are the same
in the first two digits are 35, 57, .. ,97
so we find 77 642
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\(35795+367642-74146:642\)
\(\approx35795+367642-115\)
\(\approx403437-115\)
\(\approx403322\)
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642 - 29 + 329 - 42 + 100
= ( 642 - 42 ) + ( 329 - 29 ) + 100
= 600 + 300 + 100
= 1000
Nhớ tk mình nha!
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a. x : 4 - 11250 = 22850
x : 4 = 22850 + 11250
x = 34100 : 4
x = 8525
b. (x - 60720) : 5 = 318 + 642
x - 60720 = 960 x 5
x = 4800 + 60720
x = 65520
c. (x - 1) : 8 = 1000
x - 1 = 1000 x 8
x = 8000 + 1
x = 8001
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642 + 455 + 438 + 675= (642+438)+(455+675)
= 1080+ 1130
= 2210
Hôctot
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X : 6 + 12 948 = 15 642
X : 6 = 15 642 - 12 948
X : 6 = 2694
X = 2694 x 6
X = 16164
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a/ X : 3 = 12 642
X = 12642 x 3
X = 37 926
b/ X + 21 415 = 56 743
X = 56 743 – 21 415
X = 35 328
\(k\)\(nha\)
h mjk nhé
321