Questions: 14-5= 16-7= 12-8= 13-8= =16-9 =14-7 =12-4 =18-9 14-8=10- 15-7=10- 13-6= -3 Descartes has 18 items to sell at a garage sale. He sells 9 of them. How many items does he have left? items There are 12 penguins. 5 of them leave to find food at 5:00. 3 more leave at 5: 30. How many penguins are left? penguins

14-5= 16-7= 12-8= 13-8= =16-9 =14-7 =12-4 =18-9 14-8=10- 15-7=10- 13-6= -3 Descartes has 18 items to sell at a garage sale. He sells 9 of them. How many items does he have left? items There are 12 penguins. 5 of them leave to find food at 5:00. 3 more leave at 5: 30. How many penguins are left? penguins
Transcript text: $14-5=$ $\qquad$ $16-7=$ $\qquad$ $\qquad$ $12-8=$ $\qquad$ $13-8=$ $\qquad$ $=16-9$ $=14-7$ $=12-4$ $=18-9$ $14-8=10-$ $\qquad$ $15-7=10-$ $\qquad$ $13-6=$ $\qquad$ $-3$ Descartes has 18 items to sell at a garage sale. He sells 9 of them. How many items does he have left? $\qquad$ items There are 12 penguins. 5 of them leave to find food at 5:00. 3 more leave at $5: 30$. How many penguins are left? $\qquad$ penguins
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Solution

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Solution Steps

To solve the given math problems, we will break down each question and use Python to perform the calculations.

  1. Subtraction problems:

    • $14 - 5$
    • $16 - 7$
    • $12 - 8$

  2. Number sense problems:

    • $14 - 8 = 10 - \_$
    • $15 - 7 = 10 - \_$
    • $13 - 6 = \_ - 3$

  3. Real-life modeling problem:

    • Descartes has 18 items and sells 9 of them. We need to find out how many items are left.
Solution Approach
  1. For the subtraction problems, simply subtract the second number from the first.
  2. For the number sense problems, solve for the missing number by ensuring both sides of the equation are equal.
  3. For the real-life modeling problem, subtract the number of items sold from the total number of items.
Step 1: Solving Subtraction Problems

We need to solve the following subtraction problems:

  1. \( 14 - 5 \)
  2. \( 16 - 7 \)
  3. \( 12 - 8 \)

The results are: \[ 14 - 5 = 9 \] \[ 16 - 7 = 9 \] \[ 12 - 8 = 4 \]

Step 2: Solving Number Sense Problems

We need to solve for the missing numbers in the following equations:

  1. \( 14 - 8 = 10 - \_ \)
  2. \( 15 - 7 = 10 - \_ \)
  3. \( 13 - 6 = \_ - 3 \)

The results are: \[ 14 - 8 = 6 \implies 10 - 6 = 4 \] \[ 15 - 7 = 8 \implies 10 - 8 = 2 \] \[ 13 - 6 = 7 \implies 7 + 3 = 10 \]

Step 3: Solving Real-Life Modeling Problem

Descartes has 18 items and sells 9 of them. We need to find out how many items are left: \[ 18 - 9 = 9 \]

Final Answer

\(\boxed{9}\)

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