Question

activity 3 • distributed practice
add.
1.
\

$$\begin{array}{r} 237 \\\\ + 898 \\\\ \\hline \\end{array}$$

2.
\

$$\begin{array}{r} 572 \\\\ + 489 \\\\ \\hline \\end{array}$$

3.
\

$$\begin{array}{r} 653 \\\\ + 757 \\\\ \\hline \\end{array}$$

4.
\

$$\begin{array}{r} 999 \\\\ + 312 \\\\ \\hline \\end{array}$$

5.
\

$$\begin{array}{r} 176 \\\\ + 845 \\\\ \\hline \\end{array}$$

6.
\

$$\begin{array}{r} 483 \\\\ + 268 \\\\ \\hline \\end{array}$$

Explanation:

Step1: Add units, carry over

$237 + 898$: $7+8=15$, carry 1; $3+9+1=13$, carry 1; $2+8+1=11$
Result: $1135$

Step2: Add units, carry over

$572 + 489$: $2+9=11$, carry 1; $7+8+1=16$, carry 1; $5+4+1=10$
Result: $1061$

Step3: Add units, carry over

$653 + 757$: $3+7=10$, carry 1; $5+5+1=11$, carry 1; $6+7+1=14$
Result: $1410$

Step4: Add units, carry over

$999 + 312$: $9+2=11$, carry 1; $9+1+1=11$, carry 1; $9+3+1=13$
Result: $1311$

Step5: Add units, carry over

$176 + 845$: $6+5=11$, carry 1; $7+4+1=12$, carry 1; $1+8+1=10$
Result: $1021$

Step6: Add units, carry over

$483 + 268$: $3+8=11$, carry 1; $8+6+1=15$, carry 1; $4+2+1=7$
Result: $751$

Answer:

1. $1135$
2. $1061$
3. $1410$
4. $1311$
5. $1021$
6. $751$