Post your algorithm(s) from 2.2 on subtraction of integers. Include one for how to solve when both numbers have the same sign and one for how to solve when both numbers have different signs.
The algorithm for negative is you subtract normally. The difference will be negative if the 1st number is larger than the 2nd. The difference will be positive if the 1st number is smaller than the 2nd number.
There are many more algorithms to consider and add. We discussed positive - positive, negative - positive, positive - negative, and negative - negative. Add what you would do for all those types of problems.
Negative&Negative:Take each number and add them together. (-8)-(-9)=(-17) 8=9=17 Positive&Positive: Take each number and add them together (+2)-(+6)=(+8) 2+6=8 Positive&Negative: Take away the signs and add them together and with the biggest number you add the sign on it to the answer. (+7)-(-4)=(-11) 7+4=11 Negative&Positive: Add the numbers together and the biggest number you add the sign on it to the answer. (-5)-(+3)=(-8) 5+3=8
The algorithm for negative is you subtract normally. The difference will be negative if the 1st number is larger than the 2nd. The difference will be positive if the 1st number is smaller than the 2nd number.
There are many more algorithms to consider and add. We discussed positive - positive, negative - positive, positive - negative, and negative - negative. Add what you would do for all those types of problems.
Negative - Positive ~ Add the 2 numbers together and make the answer a negative Negative - Negative ~ Keep the value of the 1st number, make the 2nd number positive and then add them together Positive - Negative ~ Drop the Negative on the 2nd sign and add the two number together Positive - Positive ~ You subtract normally. The difference will be Positive if the 1st number is larger than the 2nd. The difference will be Negative if the 1st number is smaller than the 2nd number
Might want to double check those. There is one that isn't correct and one that I think you mixed up a sign on. If you have a positive - a positive are there any negative signs to take off? Examples might help you find your error.
The algorithm for negative is you subtract normally. The difference will be negative if the 1st number is larger than the 2nd. The difference will be positive if the 1st number is smaller than the 2nd number.
There are many more algorithms to consider and add. We discussed positive - positive, negative - positive, positive - negative, and negative - negative. Add what you would do for all those types of problems.
For positive-positive you take off the negative signs and subtract them. For negative-negative you take the 1st number and the 2nd number, and add them. For positive-negative you take the signs away and add them together. For negative-positive you take the signs away and the bigger numbers sign.
Negative-Negative You take the first number and the second number and then you add them Positive-Negative You take the signs away and add them together. Positive-Positive you subtract normally Negative-Positive you take the signs away and the bigger numbers sign on the answer.
Negative - Positive ~ Add the 2 numbers together and make the answer a negative Negative - Negative ~ Keep the value of the 1st number, make the 2nd number positive and then add them together Positive - Negative ~ Drop the Negative on the 2nd sign and add the two number together Positive - Positive ~ You subtract normally. The difference will be Positive if the 1st number is larger than the 2nd. The difference will be Negative if the 1st number is smaller than the 2nd number
P-p just subtract P-N Add the numbers N-p Subtract or add the numbers together. Answer is negative N-N Add numbers together and take the larger numbers sign.
(P- P)-JUST SUBTRACT (P- N)-ADD THE #'S (N- P)-YOU WOULD ADD OR SUBTRACT THE #'S TOGETHER. THE ANSWER IS NEGATIVE. (N- N)-ADD THE #'S TOGETHER AND TAKE THE LARGER #'S SIGN
The algorithm for negative is you subtract normally. The difference will be negative if the 1st number is larger than the 2nd. The difference will be positive if the 1st number is smaller than the 2nd number.
ReplyDelete+12-+8=-4
-5-+7=+2
-4-2=-2
good job markey :)
DeleteThere are many more algorithms to consider and add. We discussed positive - positive, negative - positive, positive - negative, and negative - negative. Add what you would do for all those types of problems.
DeleteNegative&Negative:Take each number and add them together.
Delete(-8)-(-9)=(-17) 8=9=17
Positive&Positive: Take each number and add them together
(+2)-(+6)=(+8) 2+6=8
Positive&Negative: Take away the signs and add them together and with the biggest number you add the sign on it to the answer.
(+7)-(-4)=(-11) 7+4=11
Negative&Positive: Add the numbers together and the biggest number you add the sign on it to the answer.
(-5)-(+3)=(-8) 5+3=8
The algorithm for negative is you subtract normally. The difference will be negative if the 1st number is larger than the 2nd. The difference will be positive if the 1st number is smaller than the 2nd number.
ReplyDelete+9-+7=+2
-9-+7=-2
-2--2=-4
There are many more algorithms to consider and add. We discussed positive - positive, negative - positive, positive - negative, and negative - negative. Add what you would do for all those types of problems.
DeleteNegative - Positive ~ Add the 2 numbers together and make the answer a negative
DeleteNegative - Negative ~ Keep the value of the 1st number, make the 2nd number positive and then add them together
Positive - Negative ~ Drop the Negative on the 2nd sign and add the two number together
Positive - Positive ~ You subtract normally. The difference will be Positive if the 1st number is larger than the 2nd. The difference will be Negative if the 1st number is smaller than the 2nd number
p-p...you take off the negative signs and subtract them
ReplyDeleten-n...you take the 1st number and the 2nd number, and add them
p-n...take the signs away and add them together
n-p...take the signs away and the bigger numbers sign
-phyllis-
Might want to double check those. There is one that isn't correct and one that I think you mixed up a sign on. If you have a positive - a positive are there any negative signs to take off? Examples might help you find your error.
DeleteThe algorithm for negative is you subtract normally. The difference will be negative if the 1st number is larger than the 2nd. The difference will be positive if the 1st number is smaller than the 2nd number.
ReplyDelete+9-+7=+2
-9-+7=-2
-2--2=-4
There are many more algorithms to consider and add. We discussed positive - positive, negative - positive, positive - negative, and negative - negative. Add what you would do for all those types of problems.
DeleteFor positive-positive you take off the negative signs and subtract them.
ReplyDeleteFor negative-negative you take the 1st number and the 2nd number, and add them.
For positive-negative you take the signs away and add them together.
For negative-positive you take the signs away and the bigger numbers sign.
Negative-Negative
ReplyDeleteYou take the first number and the second number and then you add them
Positive-Negative
You take the signs away and add them together.
Positive-Positive
you subtract normally
Negative-Positive
you take the signs away and the bigger numbers sign on the answer.
Negative - Positive ~ Add the 2 numbers together and make the answer a negative
ReplyDeleteNegative - Negative ~ Keep the value of the 1st number, make the 2nd number positive and then add them together
Positive - Negative ~ Drop the Negative on the 2nd sign and add the two number together
Positive - Positive ~ You subtract normally. The difference will be Positive if the 1st number is larger than the 2nd. The difference will be Negative if the 1st number is smaller than the 2nd number
P-p just subtract
ReplyDeleteP-N Add the numbers
N-p Subtract or add the numbers together. Answer is negative
N-N Add numbers together and take the larger numbers sign.
(P- P)-JUST SUBTRACT
ReplyDelete(P- N)-ADD THE #'S
(N- P)-YOU WOULD ADD OR SUBTRACT THE #'S TOGETHER. THE ANSWER IS NEGATIVE.
(N- N)-ADD THE #'S TOGETHER AND TAKE THE LARGER #'S SIGN