Question

Please help and explain please !!!!!!

Answer 1

these are square root problems.
if you have a scientific calculator,then use it in the future, because it helps.
1. sqrt of 4=2X2=4.
2. the sqrt of 12 and 6 is a long decimal, so it is shortened. 3.46X2.44=8.4424
3. 2.64-1 =1.64
4. 3/1.41=2.12
Hope this helps!

Answer 2

21. 2•2=4
24. 3.4•2.4=5.8
27. -1.6•3.6=-5.76
30. 3/1.4=2.1

Hope this helps!