Addition Practice Problems: Master Basic Math Skills

To solve this problem, we need to add one ten (10) and one unit (1) to the number 66.

We'll follow these steps to find the new number:

• Step 1: Start with the original number, $66$.
• Step 2: Add one ten. This means adding $10$ to $66$.
  $66 + 10 = 76$.
• Step 3: Add one unit to the result from Step 2. This means adding $1$ to $76$.
  $76 + 1 = 77$.

Therefore, after adding one ten and one unit to 66, the resulting number is $77$.

To find the resulting number when ten units are added to 72, we will perform the following steps:

• Step 1: Identify the starting number, which is 72.
• Step 2: Add 10 to the starting number. This is done by calculating $72 + 10$.

Let's perform the calculation:

$72 + 10 = 82$

Therefore, the resulting number when ten units are added to 72 is $82$.

To solve this problem, we'll perform simple addition:
Step 1: Identify the numbers to be added, which are 31 and 50.
Step 2: Calculate the sum: $31 + 50$.

Let's perform the calculation:

• Start the addition from the rightmost digit (units place).
• In the units place, add 1 (from 31) and 0 (from 50), giving us 1.
• In the tens place, add 3 (from 31) and 5 (from 50), which gives us 8.

Since there's nothing to carry over, the sum directly gives us the resulting number. Thus, $31 + 50 = 81$.

Therefore, the resulting number when adding fifty units to the number 31 is $81$.

To solve this problem, we'll perform the addition step-by-step, carefully keeping track of place values.

First, we start with the number 34.
We need to add 2 tens, which is equivalent to adding 20. Thus:
$34 + 20 = 54$

Next, add 2 units to the new total:
$54 + 2 = 56$

The final number we get after adding 2 tens and 2 units to 34 is $\mathbf{56}$.

To solve this problem, we'll follow these steps:

• Step 1: Add the 3 tens to the number 55.
• Step 2: Add the 4 units to the result from Step 1.

Let's work through each step:

Step 1: We need to add three tens to 55. Three tens equal $3 \times 10 = 30$.
Thus, adding 30 to 55 gives us:

$55 + 30 = 85$

Step 2: Now, we add the 4 units to the result of Step 1 (which is 85).
Adding 4 gives us:

$85 + 4 = 89$

Therefore, the solution to the problem is $89$.