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
c. 27.34 + 27.56 + 90.20 + 26.90
= 27.(34 + 56) + 90.(20 + 26)
= 27.90 + 90.46
= 90.(27 + 46)
= 90 . 73
= 6570
d. 12.37 + 12.78 + 115.29 + 115.59
= 12.(37 + 78) + 115.(29 + 59)
= 12.115 + 115.88
= 115.(12 + 88)
= 115 . 100
= 11500
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
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
c. 27.34 + 27.56 + 90.20 + 26.90
= 27.(34 +56) + 90.(20 + 26)
= 27.90+ 90.46
=90.(27+46)
=90.73
=6570
d. 12.37 + 12.78 + 115.29 + 115.59
=12.(37 + 78) + 115.(29 + 59)
=12.115+115.88
=115(12+88)
=115.100
=11500
a: \(45\cdot34+45\cdot37+71\cdot23+71\cdot33\)
\(=45\cdot\left(34+37\right)+71\cdot\left(22+33\right)\)
\(=45\cdot71+71\cdot55\)
=7171
b: \(23\cdot46+23\cdot52+98\cdot35+98\cdot42\)
\(=23\cdot\left(46+52\right)+98\left(35+42\right)\)
\(=23\cdot98+98\cdot77\)
=9800
c: \(27\cdot34+27\cdot56+90\cdot20+90\cdot26\)
\(=27\cdot90+90\cdot46\)
\(=90\cdot73=6570\)
d: \(12\cdot37+12\cdot78+115\cdot29+115\cdot59\)
\(=12\cdot115+115\cdot88\)
=11500