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34+44+26+46+79+21+46+56+44+64+200=
=(34+56)+(44+46)+(26+64)+(79+21)+(44+46)+200
=90+90+90+90+100+200
=90+90+90+90+100+100+100
=90x4+100x3
=360+300
=660
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\(\sqrt{900}=30\)
234+456+870=1560
\(\frac{34}{54}+\frac{56}{108}=\frac{31}{27}\)
5353-6858=-1505
Chúc bạn học giỏi nha!!!
K cho mik vs nhé
\(\sqrt{900}=30\)
\(234+456+870=1470\)
\(\frac{34}{54}+\frac{56}{108}=\frac{31}{27}\)
\(5353-6868=-1515\)
nha bn chúc bn học giỏi
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a) 125.3+125.125.6
=125.3+125.750
=125.(3+750)
=125.753
=94125
b) (245.99+245)-(145.101-145)
=(245.(99+1))-(145.(101-1))
=245.100-145.100
=(245-145).100
=100.100
=10000
c) 154.(28+52)-45.(26+54)
=154.80-45.80
=(154-45).80
=109.80
=8720
a) 125x3+125+125x6
=125x(3+1+6)
=125x10
=1250
b) (245x99+245)-(145x101-145)
=(245x99+245)-(145x100)
=(245x100)-14500
=24500-14500
10000
c) 154x80-45x80
=80x(145-45)
=80x100
=8000
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đề bài thiếu à
127+24534-56-54
=24661-(56+54)
=24661-110
=24551