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1234 x 45 - 1234 x 35 + 23450
= 1234 x ( 45 - 35 ) + 23450
= 1234 x 10 + 23450
= 12340 + 23450
= 35790
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Ta có: 45+(1234+x)=45+1234+x=1234+(45+x)
Theo đề bài ta có: 45+(1234+x)=1234+(45+120)
Nên: 1234+(45+x)=1234+(45+120)
Từ đó suy ra x = 120.
Đáp án A
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1234 x 89 + 1234 x 1 + 1234 x 10
= 1234 x ( 89 + 1 + 10 )
= 1234 x 100
= 123400
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bạn bấm vào đúng 0 sẽ ra kết quả
mình làm bài này rồi
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\(1234\times25+74\times1234+1234\)
\(=1234\times\left(25+74+1\right)\)
\(=1234\times100\)
\(=123400\)
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1234*101-1234
=1234*101-1234*1
= 1234*(101-1)
=1234*100
=123400
tk mình nha, thanks bạn
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\(\frac{1234\times567-667}{567+1234\times566}=\frac{1234\times\left(566+1\right)-667}{567+1234\times566}=\frac{1234\times566+1234-667}{567+1234\times566}\)
\(=\frac{1234\times566+567}{567+1234\times566}=1\)
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