=3,11+5,22+15,33+21,44+7,89+3,56+12,78+4,67

=(3,11+7,89)+(5,22+12,78)+(15,33+4,67)+(21,44+3,56)

=11+18+20+25

=74

=7,89(105-103-1-1)=7,89x100=789

\(7,89\times105-7,89\times3-7,89-7,89\\ =7,89\times\left(105-3-1-1\right)\\ =7,89\times100\\ =789\)

=789

= 7,89 x (54-52-1)

= 7,89 x 1

= 7,89

 7,89x54-7,89x52-7,89x1

=7,89x(54-52-1)

=7,89x1

=7,89

`7,89 × 54 - 7,89 × 52 - 7,89 × 1`

`= 7,89 × (54 - 52 - 1)`

`= 7,89 ×`1`

`= 7,89`

3,56x6+3,56x3+3,56

=3,56x(1+3+6)

=3,56x10

=35,6

\(3,56\times6+3,56\times3+3,56\)

\(=3,56\times\left(6+3+1\right)\)

\(=3,56\times10\)

\(=35,6\)

# Kukad'z Lee'z

35,6 nha

15,33  |___4,2       hay              153,3    |__42

                                                    273          3,65   

                                                      210

                                                          0

7,89 x 54 - 7,89 x 52 -7,89

7,89x{54-52-1}

7,89x1=7,89

k nha!

=7,89x(54-52-1)=7,89x1=7,89

7,89 x 54 - 7,89 x 52 - 7,89

<=> 7,89 x 54 - 7,89 x 52 - 7,89 x 1

= 7,89 x ( 54 - 52 - 1)

= 7,89 x ( 2 - 1 )

= 7,89 x 1

= 7,89

nha bn

= 7,89x(54-52-1)

=7,89x(2-1)

=7,89

7,89 x 54 – 7,89 x 52 – 7,89=

7,89*(54-52-1)

=7,89*1=7,89

= 7,89x(54-52-1)

= 7,89