Posted by **rebecca** on Sunday, December 30, 2007 at 8:16pm.

Never thought I would have a problem with Gr. 3 math - lol - but it goes like this. Write the addition or subtraction fact you will use to calculate each answer. Then add or subtract.

70 50 120 160

+30 +60 -30 -80

My question is what would the fact be???

- Grade 3 math -
**Writeacher**, Sunday, December 30, 2007 at 8:19pm
Are we supposed to read each problem down?

If you mean 70 + 30, etc., then each math fact is the number without the zero, I'd think. So these would be the math facts:

7+3

5+6

12-3

16-8

Since all the problems have zeroes in the ones column (place), you really don't have to think about them. Just add or subract the other numbers to solve the problems and add the zero to the answer.

Yes? No?

??

- Grade 3 math -
**rebecca**, Sunday, December 30, 2007 at 8:42pm
Yes - that was what I ws thinking too so I guess I am right - I just second guess myself - I mean some of this for a Grade 3 seems rather difficult.

- Grade 3 math -
**Writeacher**, Sunday, December 30, 2007 at 10:20pm
I think the object is to teach place value, right? Kids already know those particular math facts from grade 2, I think, so now to use those facts in more complex problems -- and to begin to understand the concept of zero -- would probably be the goal.

??

## Answer this Question

## Related Questions

- 3rd math homework - number sense write a subtraction fact using 6 such as 6...
- MATH 156 - What models can be used to help explain the concepts of addition and ...
- 6th grade math - Use the numbers 1,2,3,4,5, and 6 to write a subtraction problem...
- Very easy math - my teacher told me that the inverse of addition was subtraction...
- math - 115-100+3*5= 115-100+3*5...Use BEDMAS (Bracket, Exponent, Division/...
- Math - Write the subtraction problem as an equivalent addition problem. Explain...
- math! - hi im lauren and i have a big math test tomorrow(7th grade) and i need 2...
- math - write as an addition problem (-21)-42 A) (-21)-(-42) B) (-21)+42 c) (-21...
- Math - Use an addition or subtraction formula to write the expression as a ...
- Math - Write the subtraction as an addition for (-15) - (-39). My answer is: (-...

More Related Questions