# 2nd Grade Math: Concepts and Sample Exercises

It's a good thing young children can soak up a lot of information in a fairly short period of time, because in 2nd grade math they have a lot to learn. They will build on their earlier math education by counting by ones and tens, adding and subtracting within 20, adding a 2-digit number with a 1-digit number and telling time.

## Math Facts in 2nd Grade

### Facts and Strategies Taught

By the end of the year, students in 2nd grade should be able to:

• Quickly add and subtract 1-digit numbers
• Mentally add and subtract within 20
• Mentally add and subtract ten or 100 to any number from 100 to 900
• Add up to four 2-digit numbers
• Recognize if a number is odd or even
• Recognize place values of units, tens and hundreds
• Count to 1000
• Skip count by fives and tens
• Determine if a number is greater than or less than another number
• Use the symbols > and <
• Estimate and measure objects using inches and feet, centimeters and meters
• Tell time to the nearest five minutes, using both analog and digital clocks
• Use a.m. and p.m.
• Appropriately use money symbols - \$ and ¢
• Solve word problems that use all kinds of coins and bills up to and including \$1

### Sample Exercises

The following are math questions students might be asked during a 2nd grade test. Some of the counting and measuring answers are purposely not given. For the time-related questions, you may want to draw a clock to help your child visualize the problem.

#### Oral Questions

1. Add 7 to 9. (Answer: 16)
2. Add 12 plus 6. (Answer: 18)
3. Subtract 8 from 14. (Answer: 6)
4. What is 17 minus 9? (Answer: 8)
5. Add 10 to 751. (Answer: 761)
6. What is 100 added to 829. (Answer: 929)
7. Subtract 10 from 636. (Answer: 626)
8. What is 648 minus 100? (Answer: 548)
9. Is 421 an odd or an even number? (Answer: Odd) How about 54? (Answer: Even)
10. Count from 750 to 825.
11. Count by 5s from 15 to 55.
12. Count by 10s from 0 to 100.
13. Count by 100s from 0 to 1000.
14. Read these numbers out loud: 999; 452

#### Written Questions

1. In the number 837, which number is in the tens column? What does that mean? (Answer: 3. It means there are three tens - or 30 - in the number.)
2. In the number 654, which number is in the hundreds column? (Answer: 6)
3. Add the following: 24 + 33 + 58 + 79 (Answer: 194)
4. Is 78 greater than(>) or less than (<) 56? (Answer: >)
5. Estimate the length of this line in centimeters: -------------- Measure it and see how close you were.
6. It is time for morning recess. The clock looks like this. (Digital or analog clock showing 10:02) Tell the time to the nearest five minutes. (Answer: 10:00 a.m.)
7. If you had 3 pennies, 3 nickels, 3 quarters and 3 dimes, how much money would you have? (Answer: \$1.23)
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