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a ) 3,71 × 65 + 3,71 × 25 + 10 × 3,71
=\(3,17X\left(65+25+10\right)\)
=\(3,17X100\)
=\(317\)
34,65 + 21,78 + 65,35 + 78,22
= (34,65 + 65,35) + (21,78 + 78,,22)
= 100 + 100
= 200
4,5 x 5,5 + 4,7 x 4,5
= 4,5 x (5,5 + 4,5)
= 4,5 x 10
= 45
7,5 x 2,5 x 4
= 7,5 x 10
= 75
\(34,65+21,78+65,35+78,22=\)
\(=\left(34,65+65,35\right)+\left(21,78+78,22\right)\)
\(=100+100\)
\(=200\)
\(4,5\times5,5+4,7\times4,5=\)
\(=4,5\times\left(5,5+4,7\right)\)
\(=4,5\times10,2\)
\(=45,9\)
\(7,5\times2,5\times4=\)
\(=7,5\times\left(2,5\times4\right)\)
\(=7,5\times10\)
\(=75\)
\(\frac{180\times123+9\times4567\times2+5310\times6}{\left(2+4+6+...+20+22\right)+48}\)
\(=\frac{18\times123+18\times4567+5310\times6}{132}\)
\(=\frac{116280}{132}=\frac{9690}{11}\)
`34,65+21,78+65,35+78,22`
`=(34,65+65,35)+(21,78+78,22)`
`=100+100=200`
`b)4,5xx5,5+4,7xx4,5`
`=4,5xx(5,5+4,7)`
`=4,5xx10,2`
`=4,5xx(10+0,2)`
`=4,5xx10+4,5xx0,2`
`=45+0,9=45,9`
`c)7,25xx2,5xx4`
`=7,25xx(2,5xx4)`
`=7,25xx10=72,5`
`b)48/100+22/100+5/100+25/100`
`=>(48/100+22/100)+(5/100+25/100)`
`=>70/100+70/100`
`=>100/100=1`
a,3,31x5+6x3,31-3,31
=3,31x(5+6-1)
=3,31x10
=33,1
b) 48/100+22%+5/100+0,25
=48%+22%+5%+25%
=1
3:
a: =100+100=200
b: =4,5(5,5+4,7)
=4,5*10,2
=45,9
c: =7,5*10=75
13
13%