1.) 3+2=? ?=5 brothers 2.) 54+9=? ?=63 students 3.) 15-9=? ?=4
4.) 60-20=? ?=40 children 5.) 50-15=? ?=35 trees 6.) 14+4=? ?=18 times
Don't know why you needed help with this but ok.
Answer:
a) 1 (the slope)
b) for every one ounce of sugar you eat, you can one ounce of weight
1 liter is 1000 milliliters so 1000+299=1299 then you add 1299+398=1697 so next you subtract 2419-1697=722 so the vase will hold 722 milliliters more