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a, 15.27 - 3.5.17
= 15.27 - 15. 17
= 15 . ( 27 - 17 )
= 15 . 10
= 150
b, 55 - 5 . ( 20 + 11 )
= 55 - 100 . 55
= 55 . ( 1 - 100 )
= 55 . ( -99 )
= ...
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a 15.27-3.5.7=15.27-15.7=15.(27-7)=15.20=300
b 55-5(20+11)=55-5.20+5.11=55-100+55=55.2-100=10
c 37.(29-23)-29.(37-23)=37.29-37.23-29.37-29.23=37.(29-29)-23.(37-29)=0-23.8=0-184=(-184)
tick đúng mình nha làm ơn bạn đó bạn ko tick mình thì bạn sẽ xui cả năm
a, =15.27-15.7
=15.20=300
b,=5.11-5.20-5.11
=5(11-20-11)
=5(-20)=-100
c,=37.29-37.23-29.37+29.23
=37.29-29.37-37.23+29.23
=0+(-37+29).23
=-8.23=-184
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*\(\left(45-25\right).\left(-11\right)+29.\left(-3-17\right)\)
\(=20.\left(-11\right)+29.\left(-20\right)\)
\(=-220+\left(-580\right)\)
\(=-800\)
*\(\left(-37\right).\left(55-23\right)-55.\left(23-37\right)\)
\(=-37.32-55.\left(-14\right)\)
\(=-1184-\left(-770\right)\)
\(=-1184+770\)
\(=-414\)
*\(\left(-12\right).\left(-125\right).\left(-4\right)\)
\(=1500.\left(-4\right)\)
\(=-6000\)
*\(\left(-1\right).2.\left(-3\right).4.\left(-5\right)\)
\(=-2.\left(-12\right).\left(-5\right)\)
\(=24.\left(-5\right)\)
\(=-120\)
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a)48.45+55.48=(45+55).48=100.48=4800
b)57.37+57.23+57.40=57.(23+37+40)=57.100=5700
c)25.5.4.17.2=(25.4).(5.17.2)=100.170=17000
d)127.45+55.127-27.100=127.(45+55)-(27.100)=127.100-27.100=(127-27).100=100.100=10000
e)543+165+457+35=(543+457)+(165+35)=1000+200=1200
g)13.58.4+32.6.2+52.10=(52.58)+(52.32)+52.10=52.(58+32+10)=52.100=5200
h)25.5.4.17.2=(25.4).(17.2.5)=100.170=17000
k)(3737.43-4343.37):(2+4+6+...+100)=(37.101.43-43.101.37):(2+4+6+...+100)=0.(2+4+6+...+100)=0
i)1+5+9+...+29+33+37=(1+37)+(5+33)+...=190
a=4800
b=5700
c=17000
d=10000
e=1200
...
phần còn lại bạn tự làm nhé
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