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111112222233333 + 888887777777777 = 1000000000000000
3456 + 6544 = 10000
10 - 9 + 3 x 12 + 9 - 8 = 38
12354 x 4 + 88 = 49504
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\(3,54\times73+0,46\times25+3,54\times26+0,46\times75+3,54\)
\(=3,54\times\left(73+26+1\right)+0,46\times\left(25+75\right)\)
\(=3,54\times100+0,46\times100\)
\(=354+46=400\)
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A = 72+139+195+216
=622
B=54 x 63 + 54 x 67 - 54 x 40
= 54 x ( 63+67-40)
= 54 x 90 = 4860
A=72+139+195+216
A=(72+139)+(195+216)
A=211+411)
A=622
B=54x63+54x67-54x40
B=54x(63+67-40)
B=54x90
4860
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\(7,89\times54-7,89\times54-7,89\)
\(=7,89\times\left(54-54\right)-7,89\)
\(=7,89\times0-7,89\)
\(=0-7,89\)
\(=-7,89\)
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145/2014 x 35/54 + 145/2014x 19/54
= 145/2014 x ( 35/54 + 19/54 )
= 145/2014 x 1
= 145/2014
Chúc Bn hok tốt :3
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X x 45 + X x 54 + X = 700
X x ( 45+ 54+ 1 ) =700
X x 100 =700
X =700 : 100
X =7
\(x\times45+x\times54+x=700\)
\(\Leftrightarrow x\times\left(45+54+1\right)=700\)
\(\Leftrightarrow x\times100=700\)
\(\Leftrightarrow x=7\)
Vậy \(x=7\)
bạn ơi đây là trang wed toán cơ mà
đấy là toán à