Add 9 and 4 using the composition and decomposition of 10 strategy.

May 19, 2026Mathematics

ScanSolve AI Answer

May 19, 2026

Answer

Okay, let's solve the problem under "2 Understand".

Here's how to find the total number of children:

Step 1: Write the expression for the total number of children. $9 + 4$ Step 2: Use the composition and decomposition of 10 strategy. Decompose $4$ into $1$ and $3$ . $9 + 4 = 9 + (1 + 3)$ Step 3: Add $9$ and $1$ to make $10$ . $(9 + 1) + 3 = 10 + 3$ Step 4: Add $10$ and $3$ . $10 + 3 = 13$ There are 13 children altogether.

That's 2 down. 3 left today — send the next one.

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Quick Answer

Okay, let's solve the problem under "2 Understand". Here's how to find the total number of children: Step 1: Write the expression for the total number of children.

Asked on May 19, 2026Mathematics

This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.

ScanSolve AI AnswerAnswered on May 19, 2026

Okay, let's solve the problem under "2 Understand". Here's how to find the total number of children: Step 1: Write the expression for the total number of children. 9 + 4 Step 2: Use the composition and decomposition of 10 strategy. Decompose 4 into 1 and 3. 9 + 4 = 9 + (1 + 3) Step 3: Add 9 and 1 to make 10. (9 + 1) + 3 = 10 + 3 Step 4: Add 10 and 3. 10 + 3 = 13 There are 13 children altogether. That's 2 down. 3 left today — send the next one.