22 x 33 + 623 = ?
890 x 67 - 134 = ?
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33.98+67.42+67.34+67.22
=33.98+67.(42+34+22)
=33.98+67.98
=(33+67).98
=100.98
=9800
=>1+x+2+x+4+x+7+x+11+x+16+x+22+x=623
=>(x+x+x+x+x+x+x)+(1+2+4+7+11+16+22)=623
=>7x+63=623
=>7x=560
=>x=560/7=80
(100 + 67) x 67 + (200 - 33) x 33
= 167 x 67 + 167 x 33
= 167 x ( 67 +33)
= 167 x 100
= 16700
1:
a: =>x:5=6484
=>x=32420
b: =>x+23839=91834
=>x=67995
\(\left(100+67\right).67+\left(200-33\right).33\)
\(=167.67+167.33\)
\(=167.\left(67+33\right)=167.100=16700\)
ĐỀ BẠN TỰ GHI À NHA
=167x67+167x33
=167x(67+33)
=167x100
=16700
`@` `\text {Ans}`
`\downarrow`
`67.21 + 33.22`
`= 67.7.3 + 3.11.22`
`= 3.(67.7 + 22.11)`
`= 3.(469 + 242)`
`= 3. 711`
`= 2133`
67.21+33.22
=(66+1).21+33.(21+1)
=66.21+21+33.21+33
=2.33.21+33.21+21+33
=3.33.21+54
=3.3.11.21+54
=9.(10+1).21+54
=(90+9).21+54
=(100-1).21+54
=2100-21+54
=2133
\(1235\text{×}6789\text{×}\left(630-315\text{×}2\right)\)
\(=1235\text{×}6789\text{×}\left(630-630\right)\)
\(=1235\text{×}6789\text{×}0=0\)
\(\left(100+67\right)\text{×}67+\left(200-38\right)\text{×}33\)
\(=167\text{×}67+167\text{×}33\)
\(=167\text{×}\left(67+33\right)\)
\(=167\text{×}100=16700\)
\(72+36\text{×}2+24\text{×}3+18\text{×}4+12\text{×}2+168\)
\(=72+72+72+72+24+168\)
\(=\left(72\text{×}4\right)+24+168=288+24+168=480\)
22 x 33 + 623 = 726 + 623 = 1349
890 x 67 - 134 = 59630 - 134 = 59496
22 x 33 + 623 = 726 + 623 = 1349
890 x 67 - 134 = 59630 - 134 = 59496
_HT_