Complete the additions using tokens: i) (-3) + (-2) ii) (+5) + (-7)

March 22, 2026Mathematics

ScanSolve AI Answer

March 22, 2026

Part (i)

Step 1: Model $-3$ using $3$ negative tokens and $-2$ using $2$ negative tokens.

-3 = \bullet\bullet\bullet, \quad -2 = \bullet\bullet

Step 2: Add the tokens by combining them.

\bullet\bullet\bullet + \bullet\bullet = \bullet\bullet\bullet\bullet\bullet

Step 3: $5$ negative tokens represent $-5$ .

(-3) + (-2) = -5

-5

Part (ii)

Step 1: Model $-5$ using $5$ negative tokens and $-7$ using $7$ negative tokens.

-5 = \bullet\bullet\bullet\bullet\bullet, \quad -7 = \bullet\bullet\bullet\bullet\bullet\bullet\bullet

Step 2: Add the tokens by combining them.

\bullet\bullet\bullet\bullet\bullet + \bullet\bullet\bullet\bullet\bullet\bullet\bullet = \bullet\bullet\bullet\bullet\bullet\bullet\bullet\bullet\bullet\bullet\bullet\bullet

Step 3: $12$ negative tokens represent $-12$ .

(-5) + (-7) = -12

-12

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