Give an example of an addition problem in which you would and would not group the addends differently to add.

I wouldn't group the addends differently in a problem like 1+1+1, because, no matter which way you place the ones, you will always be adding 1+1+1.

i would group the addends differently in a problem like 3+5+7, because, in the first problem you would first add together 3+5 to get 8, and then you would add 8+7 to get 15. although, if you were to add 3+7 first, you would get 10. 10+5 is much easier to add than 8+7.

What mathematical statement is missing ? ? the answer is b

Answer:

$4034.40

step-by-step explanation:

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40