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9875:9=1097 dư 2 8866:8=1108 dư 2 9878:8=1234 dư 6 9876:8=1234 dư 4
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\(1+2+3+4+5+6+7+8+9\)
\(=\left(1+9\right)+\left(2+8\right)+\left(3+7\right)+\left(4+6\right)+5\)
\(=10+10+10+10+5\)
\(=10.4+5\)
\(=40+5\)
\(=45\)
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1236+x+563=7777
1236+x=7777-563
1236+x=7214
x = 7214-1236
x= 5978
1236+x+563=7777
1236+x =7777-563
1236+x =7214
x=7214-1236
x=5978
chúc bn học tốt!
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135 x 8 = 1080
121 x 9 = 1089
148 x 6 = 888
185 x 4 =740
nha bn HT
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a) x * 8 = 89 - 17
x * 8 = 72
x = 72 : 8
x = 9
b) 9 * x = 48 + 15
9 * x = 63
x = 63 : 9
x = 7
265770 nhé