Question

2.1 + (–3.7h) + 1.9h – 1.4

Answer 1

2.1 + (- 3.7h) + 1.9h - 1.4

= 2.1 - 3.7h (because when there is a positive and negative sign, then the number remains negative) + 1.9h - 1.4

= 0.7 - 1.8h (because when you are doing addition / subtraction of a positive and negative number, the sign will follow that of the greater number - in this case you will have a negative sign since 3.7h is greater than 1.9h)

hope this helps :)