Question

i know im going to sound a little stupid but im having issues with my little sister's 2nd grade homework.

Which is a doubles minus one fact?

- 7+7=14
- 7+5=12
- 8+7=15
- 8+8=16

With explanation please because I want to be able to teach her!

Answer 1

@StudyGurl14

Answer 2

https://www.youtube.com/watch?v=elj4aup0wJk

Answer 3

do you mean -(-7)+7 =14?

Answer 4

no thats what it shows me @Loser66

Answer 5

"Which is a doubles minus one fact?"

Answer 6

if it is -7+7 , then it is =0 , cannot be 14
if it is -(-7) +7 , then it is = 14

Answer 7

there is two minus one facts though @Compassionate

Answer 8

@Loser66 no what i typed in is what the paper shows me

Answer 9

then, It's above my head. I am sorry for being helpless :)

Answer 10

a) 7+7=14
b) 7+5=12
c) 8+7=15
d) 8+8=16

@Loser66

Answer 11

its alright :)

Answer 12

im literally getting no help

Answer 13

Double facts are relatively easy to learn and become powerful anchors for other
addition facts. Students quickly learn and identify patterns in the below sequence.
1 + 1 = 2 6 + 6 = 12
2 + 2 = 4 7 + 7 = 14
3 + 3 = 6 8 + 8 = 16
4 + 4 = 8 9 + 9 = 18
5 + 5 = 10 10 + 10 = 20

Answer 14

did that help

Answer 15

its doubles minus one fact so not really :) @woods33

Answer 16

Doubles Minus one is very similar, except you take the larger addend and double it. This time you will subtract one.

Example
7+6=
7+7=14-1=13

Answer 17

its telling her to choose one

Answer 18

that help out

Answer 19

so the answer 7+7=14 ?

Answer 20

yes 7+7=14