Respuesta :

kierarener012
In a problem like 1+1+1, I would not group the addends differently. This is because, no matter which way you place the ones, you will always be adding 1+1+1.

In a problem like 3+5+7, I would group the addends differently (3+7+5). This is 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. However, if you were to add 3+7 first, you would get 10. 10+5 is much easier to add than 8+7.

Answer:

The numbers which have unit digit Zero for a two digit number, and for three digit number ones and tens place should be equipped with zero,So on..... does not require addends to group together.

For example, addition problem in which you would not regroup addends

 → 10+20+30

→  30 +40 +50

→ 100+200+300

And Addition Problems in which you will regroup addends

→ 17 +5 +3=(17+3)+5=20+5=25

→ 4+9+6=(4+6)+9=10+9=19

→ 13+19+17=(13+17)+19=30+19=49

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