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\(49.56+78.49-49.34\)
\(=49.\left(56+78-34\right)\)
\(=49.100=4900\)
Tích nha
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C = 49.45 + 7².55 - 125 : 5²
= 49.45 + 49.55 - 125 : 25
= 49.(45 + 55) - 5
= 49.100 - 5
= 4900 - 5
= 4895
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a) 76.12 + 24.12 - 200
= 12.(76+24)-200
= 12.100 -200
= 1200-200 = 1000
b) 3^4 . 36 + 4^3 . 81 -100
= 81.36 + 64.81 -100
= 81.(36+64)-100
=81.100-100
=8100-100 = 8000
a) 76.12 + 24.12 - 200
= 12.( 76+24 ) - 200
= 12.100 - 200
= 1200 - 200 = 1000
b) 3^4 . 36 + 4^3 . 81 - 100
= 81.36 + 64.81 - 100
= 81.(36+64) - 100
=81.100 - 100
=8100 - 100 = 8000
Học tốt!
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B=2.6.15+4.9.10+10.9.35+202.51.20/7.36+9.56+35.9.14+707.51.8
=2.90+4.90+90.35+202.51/7.4.9+9.56+9.35.14+707.51.8
=(2+4+35).90+202.51/293622
còn lại đợi tớ nghĩ đã
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(B=\frac{2.6.15+4.9.10+10.9.35+202.35.20}{7.26+9.56+35.9.14+707.51.8}\)
\(B=\frac{2.6.3.5+4.9.2.5+2.5.9.35+101.2.7.5.20}{7.13.2+9.7.4.2+35.9.7.2+101.7.51.2.4}\)
\(B=\frac{2.5.\left(6.3+9.4+35.9+101.7.20\right)}{7.2.\left(13+9.4+35.9+101.51.4\right)}\)
\(B=\frac{5.14509}{7.20968}\)
\(B=\frac{72545}{146776}\)
mk ko biết đúng hay sai đâu, nhưng mà mk ra số to quá, bn thử xem lại đề bài đi
![](https://rs.olm.vn/images/avt/0.png?1311)
(1981 x 1982 - 990) : (1980 x 1982 + 992)
=(1980 x 1982+1982 -990) : (1980 x 1982 +992)
=(1980 x 1982 + 992) : ( 1980 x 1982 + 992)
=1
B=[(45.79+45.21)]:90-5^2]:5+2^3 B=[(45.79+45.21):90-25]:5+8 B=[(45.(79+21):65]:13 B=[(45.100):65]:13 B=[4500:65]:13 B=4500:65:13
a, 23.76+76.65+76.12=76.(23+65+12)=76.100=7600
b, 49.56+49.45-49=49.56+49.45-49.1=49.(56+45-1)=49.100=4900
c, 2.35.9+3.6.37+9.56=1800
d, 45.79+79.64-109.29+50.91=79.(45+64)-109.29+50.91=79.109-109.29+50.91=109.(79-29)+50.91=109.50+50.91=50.(109+91)=50.200=1000
a,76.(23+65+12)
=76.100
=7600
b,49.(56+45-1)
=49.100
=4900