Answer:
19.5
Step-by-step explanation: I took the test.
2800 ÷ 400
Cross out 2 zeros from both numbers, then you have 28 ÷ 4 = 7
2
Step-by-step explanation:
if you multiply 2 by 3=6
There is a 47cm difference between the two....
So you just added 28cm to 19cm to get 47cm....
Because 19-(-28) is 19 + 28.
Hope this helps :D