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234576 + 578957 + 47958 = 861482
41235 + 24756 - 37968 = 28023
324586 - 178395 + 24605 = 170778
254782 - 34569 - 45796 = 174417
k vs
234576 + 578957 + 47958 = 861491
41235 + 24756 - 37968 = 28023
324586 - 178395 + 24605 = 170796
254782 - 34569 - 45796 = 174417
HT
![](https://rs.olm.vn/images/avt/0.png?1311)
a, 234576 + 578957 + 47958 = 861491
b, 41235 + 24756 - 37968 = 28023
![](https://rs.olm.vn/images/avt/0.png?1311)
234576 + 578957 + 47958 = 861491
41235 + 24756 - 37968 = 28023
324586 - 178395 + 24605 = 170796
254782 - 34569 - 45796 = 174417
234576 + 578957 + 47958 = 813533 + 47958 = 861491
41235 + 24756 - 37968 = 65991 - 37968 = 28023
324586 - 178395 + 24605 = 146191 + 24605 = 170796
254782 - 34569 - 45796 = 220213 - 45796 = 174417
hoc tot
![](https://rs.olm.vn/images/avt/0.png?1311)
Bài 1:
234576 + 578957 + 47958 = 234576 + ( 578957 + 47958 ) = 234576 +626915 = 861491
41235 + 24756 - 37968 = 65991 - 37968 = 28023
324586 - 178395 + 24605 = 324586 - ( 178395 + 24605 ) = 324586 - 203000 = 121586
254782 - 34569 - 45796 = 220213 - 45796 = 174417
Bài 2 :
a. 967364 + (20625 + 72438)
= 967364 + 93063 = 1060427
420785 + (420625 - 72438)
= 420785 + 348187 = 768972
b. (47028 + 36720) + 43256
= 83748 + 43256 = 127004
(35290 + 47658) - 57302
= 82948 - 57302 = 25646
c. (72058 - 45359) + 26705
= 26699 + 26705 = 53404
(60320 - 32578) - 17020
= 27742 - 17020 = 10722
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{5}{2}\)x\(\frac{1}{3}\)+\(\frac{1}{4}\)= \(\frac{5}{6}\)+\(\frac{1}{4}\)= \(\frac{10}{12}\)+\(\frac{3}{12}\)= \(\frac{13}{12}\)
\(\frac{5}{2}\)-\(\frac{1}{3}\):\(\frac{1}{4}\)= \(\frac{5}{2}\)-\(\frac{1}{3}\)x\(\frac{4}{1}\)= \(\frac{5}{2}\)-\(\frac{4}{3}\)= \(\frac{15}{6}\)-\(\frac{8}{6}\)=\(\frac{7}{6}\)
Chi tiết lun nha, nhớ k đúng cho mik nha :33
\(\frac{5}{2}\times\frac{1}{3}+\frac{1}{4}\)
\(=\frac{5}{6}+\frac{1}{4}\)
\(=\frac{10}{12}+\frac{3}{12}\)
\(=\frac{13}{12}\)
\(\frac{5}{2}-\frac{1}{3}\div\frac{1}{4}\)
\(=\frac{5}{2}-\frac{1}{3}\times\frac{4}{1}\)
\(=\frac{5}{2}-\frac{4}{3}\)
\(=\frac{15}{6}-\frac{8}{6}\)
\(=\frac{7}{6}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(=\left(\dfrac{3}{4}+\dfrac{1}{4}\right)+\left(\dfrac{2}{5}+\dfrac{3}{5}\right)=1+1=2\)
hello
tính máy tính