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\(\text{a. 237 . ( -26) + 26 . 137}\)

\(=\left(-6162\right)+3562\)

\(=-2600\)

\(\text{b. 63 . ( -25) + 25 . ( -23 )}\)

\(=\left(-1575\right)+\left(-575\right)\)

\(=-2150\)

a) 237.(-26)+26.137

=26.(-237+137)

=26.(-100)

=-2600

a. 237 . ( -26) + 26 . 137= -26. \(\left[-137+237\right]\)

=-26.100 -2600

b. 63 . ( -25) + 25 . ( -23 )

=25.\(\left[-63+\left(-23\right)\right]\) =25.(-86) =- 2150

237 . ( -26 ) + 26 . 137

= ( -237 ) . 26 + 26 . 137

= 26 . [ ( -237 ) + 137 ]

= 26 . ( -100 )

= -2600

63 . ( -25 ) + 25 . ( -23 )

= ( -63 ) . 25 + 25 . ( -23 )

= 25 . [ ( -63 ) + ( -23 ) ]

= 25 . ( -86 )

= -2150

237.(-26)+26.137 

= -237.26+26.137

= 26.(-237+137)

= 26.-100

= -2600

63.(-25)+25.(-23)

= -63.25+25.(-23)

= 25.[-63+(-23)]

= 25.(-86)

= -2150

237 . (-26)+26.137 

=-6162 + 3562

=-2600

*63 .(-25)+25.(-23)

=-1575 + -575

=-2150

a) 237 . ( -26 ) + 26 . 137

=  ( - 237 ) . 26 + 26 . 137

= 26 . [ ( -237 ) + 137 ]

= 26 . ( -100 )

= -2600

b) 63 . ( -25 ) + 25 . ( -23 )

= ( -63 ) . 25 + 25 . ( -23 )

= 25 . [ ( -63 ) + ( -23 ) ]

= 25 . ( -86 )

= -2150

1) $(-35)\cdot18+28\cdot35$

$=35\cdot(-18)+28\cdot35$

$=35\cdot(-18+28)$

$=35\cdot10$

$=350$

2) $53\cdot29-47\cdot(-29)$

$=53\cdot29-47\cdot(-1)\cdot29$

$=53\cdot29+47\cdot29$

$=29\cdot(53+47)$

$=29\cdot100$

$=2900$

3) $125\cdot(-24)+24\cdot225$

$=(-125)\cdot24+24\cdot225$

$=24\cdot(-125+225)$

$=24\cdot100$

$=2400$

4) $26\cdot(-121)-121\cdot(-36)$

$=-121\cdot[26+(-36)]$

$=-121\cdot(26-36)$

$=-121\cdot(-10)$

$=121\cdot10$

$=1210$

5) $65\cdot(-25)+25\cdot(-23)$

$=-65\cdot25+25\cdot(-23)$

$=25\cdot(-65-23)$

$=25\cdot(-88)$

$=-2200$

6) $237\cdot(-26)+26\cdot137$

$=-237\cdot26+26\cdot137$

$=26\cdot(-237+137)$

$=26\cdot(-100)$

$=-2600$

7) $30\cdot(-125)+25\cdot30$

$=30\cdot(-125+25)$

$=30\cdot(-100)$

$=-3000$

8) $(-37)\cdot69+(-31)\cdot37$

$=37\cdot(-69)+37\cdot(-31)$

$=37\cdot(-69-31)$

$=37\cdot(-100)$

$=-3700$

9) $31\cdot72-31\cdot70-31\cdot2$

$=31\cdot(72-70-2)$

$=31\cdot(2-2)$

$=31\cdot0$

$=0$

10) $(-12)\cdot47+(-12)\cdot52+(-12)$

$=-12\cdot(47+52+1)$

$=-12\cdot100$

$=-1200$

$\text{#}Toru$

a: =34x(-100)=-3400

b: =41(-76-24)=-4100

c: =-24(125-225)=2400

d: =26(-237+137)=-2600

e: =25(-63+23)=25x(-40)=-1000

= -237. 26 + 26. 137

26.( - 237 + 137 )

=26.  (-100)

= -2600

a) 237.(-26) + 26.137

= -237.26 + 26.137

= 26.(-237 + 137)

= 26.(-100)

= -2600

b) 63.(-25) + 25.(-23)

= -63.25 + 25.(-23)

= 25.(-63 - 23)

= 25.(-86)

= -2150

=63 . (-25 ) + (-25).23

-25 .(63+ 23)

-25 . 86

= -2150