The correct answer is 841.  We start in the ones column on the far right and add 6 and 5.  This is 11 so we have to carry the tens digit (1) to the next column and being the ones digit (also a 1) down.  Adding the tens column we get

so once again we carry the 1 and bring the 4 down. Next we add the hundreds column which

which we bring down.  Thus the final answer is 841.

In order to figure out what time is 3 hours and 45 minutes after 10:25 AM, first deal with the minutes.  45 minutes after 10:25 AM is 11:10 AM.  Now add 3 hours to that.  12:10 PM is one hour, 1:10 PM is two hours, and 2:10 PM is three hours.  Thus 2:10 PM is the answer.

To find the sum, you need to add.  Line up all numbers vertically.  Add up the ones column first:

Carry the “10” in 15. Now add the tens place:

The sum is 125.

To solve this problem, you first need to see that the two addends make up parts of the whole, which is 22. Since the first addend is 4, we already know that one part is 4. To figure out the missing addend, we can either:

A) start at 4 and count up to 22

B) start at 22 and count back by 4

To double check the answer, you just need to make sure that when you put the two parts together, you get the whole, 22!

Because Hammond has 3 bins, and each bin has 5 crayons, you should add 5 together 3 times:

One way to double check your answer is to draw a picture of the problem and then see if the number sentence matches the picture.

After  and a half hours (or  hours and  minutes), it is  o'clock. The hour resets to  after . Since  hours and  minutes have passed when it is , there will be  and a half hours (or  hours and  minutes) remaining once it is  (because ).  hours and  minutes after  is :.

The sum of a group of numbers is when you add them all together.  Thus you need to add in column form all three numbers together.

 so carry the 1 and add 

 so the final answer is .

Damya bought a hot dog for  cents and a drink for  cents.

First, add the tens together. 5 tens and 3 tens make 8 tens, or 80.

Next, add the ones together. 4 ones and 5 ones make 9 ones, or 9.

. You can start at 80 and count up 9 with pictures, on your fingers, or you can just know.

Double check your answer by drawing tens and ones, then counting all tens and counting on by ones:

||||| + ||| = 8 tens.

**** + ***** = 9 ones.

If Orlando's practice lasts a half hour, or thirty minutes, the minute hand will move halfway around the clock, or thirty minutes. Since it started at thirty minutes, it will move halfway around the clock to 60 minutes. The hour hand will also move halfway between two hours. Since it's halfway between the 10th and 11th hour, it'll move forward to the 11th hour.