Answer
Estimate: $(8\times20)+(10\times30)$=160+300=460 students
Exact: 488 students
Work Step by Step
8 classrooms with 22 students each
12 classrooms with 26 students each
Total Students: $(8\times22)+(12\times26)$
Now, Let's find estimate
22 (round to) 20
12 (round to) 10
26 (round to) 30
$(8\times20)+(10\times30)$=160+300=460 students
Exact:
$(8\times22)+(12\times26)$
= 176+312
= 488 students
