273.63+45.37+45.63+273.37

=276.(63+37)+45.(37+63)

=276.100+45.100

=27600+4500

=32100

\(=273\left(63+37\right)+45\left(37+63\right)\)

\(=273.100+45.100\)

\(=100\left(273+45\right)\)

\(=100.318\)

\(=31800\)

a) 45.37 + 45.63 - 100

\( 45.(37 + 63) – 100 \)

\(45.100 – 100\)

 \(100.(45 – 1) \)

\( 100 . 44 = 4400\)

a,-9

b,116.42

c,300

d,21

a)\(=45.\left(37+63-\dfrac{20}{9}\right)=45\cdot\dfrac{880}{9}=4400\)

b)\(=148.9-9.48=9.\left(148-48\right)=9.100=900\)

\(45.37+95.45+55.61+69.55\)

\(=45.\left(37+95\right)+55.\left(61+69\right)\)

\(=45.132+55.130=13090\)

=45. (37+95)+55.(61+69)

=45.132+55.130

=5940+7150

=13090

k mình nha 

45 . 37 + 95 . 45 + 55 . 61 + 69 . 55

= 45 ( 37 + 95 ) + 55 ( 61 + 69 )

= 45 . 132 + 55 . 130

= 130 ( 45 + 55 ) + 45 . 2

= 130 . 100 + 90

= 13 000 + 90

= 13 090

=))

a. 45.34 + 45.37 + 71.23 + 33.71

= 45.(34 + 37) + 71.(23 + 33)

= 45.71 + 71.56

= 71.(45 + 56)

= 71 . 101

= 7171

a) \(45.34+45.37+71.23+33.71=45\left(34+37\right)+71\left(23+33\right)=45.71+71.56=71\left(45+56\right)=71.101=7171\)

b) \(23.46+23.52+98.35+98.42=23\left(46+52\right)+98\left(35+42\right)=23.98+98.77=98\left(23+77\right)=98.100=9800\)

c) \(27.34+27.56+90.20+26.90=27\left(34+56\right)+90\left(20+26\right)=27.90+90.46=90\left(27+46\right)=90.73=6570\)

d) \(12.37+12.78+115.29+115.59=12\left(37+78\right)+115\left(29+59\right)=115.12+115.88=115\left(12+88\right)=115.100=11500\)

b. 23.46 + 23.52 + 98.35 + 98.42

= 23.(46 + 52) + 98.(35+42)

= 23.98 + 98.77

= 98.(23 + 77)

= 98 . 100

= 9800

d. 12.37 + 12.78 + 115.29 + 115.59

= 12 . ( 37 + 78 ) + 115 . ( 29 + 59 )

= 12 . 115 + 115 . 88

= ( 12 + 88 ) . 115

= 100 . 115

= 11 500

a. 45.34 + 45.37 + 71.23 + 33.71

= 45 . ( 34 + 37 ) + 71 . ( 23 + 33 )

= 45 . 71 + 71 . 56

= ( 45 + 56 ) . 71

= 101 . 71

= ( 100 + 1 ) . 71

= 7100 + 71

= 7171

a)=45.(34+37)+71(23+33)

=45.71+71.55

=71.(45+55)

=71.100

=7100

100x10=1000

k cho mình nhe bạn, mình bị âm điểm

1000 bạn nhé

k mk nha thanks nhiều

100+100+100+100+100+100+100+100+100+100

=100x10

=1000

tk nha bạn

thank you bạn

(^_^)

100999

=100000+99-100+100

=100099-200

=99899

100099

nhớ k nha!