Solve the following math problems using addition or subtraction. Try out a number line strategy!

1. 196 - 154 =

2. 219 - 161 =

3. 247 - 199 =

4. 208 - 99 =

1. 196 - 154 =  42

2. 219 - 161 = 58

3. 247 - 199 = 48

4. 208 - 99 = 109

the highest percentage for deaths in construction from highest to lowest is as follows: falls, struck by objects, electrocution, and caught-in/between. these four are collectively known as fatal four.

in the case of falls, the type that is responsible for the overall highest death in the category is falls from roofs.