Question

Can get some help on 2,4,22, 42 and 50 please

Answer 1

2) Inserting zeros at the right end of a decimal does not change its value

0.3 = 0.3000

4) To estimate the difference between 0.31 and 0.108, subtract 0.3.

22) 75.285 + 2 + 3.871 + 0.5 = 81.656

42) 0.01 -  0.0001 = 0.0099

50) 9 - 4.63 = 4.37

Answer 2

#2: zeros

Ex: 23.000000(zeros at the end of a decimal don’t change its value it’s still 23)

#4: difference

If you are subtracting(.31 + 0.108) - (0.1 + 0.3) then you are calculating or estimating the difference.

#22: 81.656

75.285 + 2 + 3.871 + 0.5 = 81.656

#42: 0.0099

When you subtract 0.0001 from 0.01 you get 0.0099(remember, when you subtract 0.01 is the bigger number so you put that one on top because it has less zeros on the left, but when it has less zeros on the right it doesn’t change the value)

#50: 4.37

9.00 - 4.63 = 4.37

Hopefully this helps you!