Help me with 12 and 13, please! The question is, “Write a subtraction number sentence for the models shown.” Please explain too!

- 8 -(-4) = -4. The shaded buttons with - in them are negative. Cross then mount is subtract because they are “taking away”

3 - (-6) = -9. They started with 3 buttons. In order to subtract negatives when there,are none (or not enough, you have to bull negatives out of thin air ( bypassing zeros) so you add zero pains (as many as you need to subtract the negative.

A zero pair is two buttons that add to zero: one positive and one negative

JackelineCasarez JackelineCasarez · Answer 2 · 2021-12-01T12:17:02+01:00

The subtraction model for the given illustrations would be as follows:

12). -8 - (-4) + 6 = 2

13). 3 - (-6) = -9

12). In this part, the buttons having (-) sign signal their values being negative and (+) sign shows positive numbers while the cross button denotes the number subtracted from the total.

Since there are 4 cross out of 8(-) sign buttons with 6 +ve buttons which give the equation i.e. "-8 - (-4) + 6 = 2."

13). Similarly, the 6 (-) sign buttons denote the value of (-8) and 3 +ve sign button shows the value of +3.

According to this, we get the value "3 - (-6) = -9."

Learn more about 'Subtraction' here:

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