\(a,856:214+1284:214\\ =\left(856+1284\right):214\\ =2140:214=10\\ b,1778:254+3302:254\\ =\left(1778+3302\right):254\\ =5080:254\\ =20\)
Bài 2:
a) \(856
:
214+1284
:
214=\left(856+1284\right)
:
214=2140
:
214=10\)
b) \(1778
:
254+3302
:
254=\left(1778+3302\right)
:
254=5080
:
254=20\)