(Ask your child's teacher for his/her NWEA RIT.)First Grade Number and Operations Base Ten
What Your Child Will Learn
Count to 120 starting at any number. Read and write numbers. (1.NBT.1) Understand that the two-digits in a two-digit number represent tens and ones. (1.NBT.2) Compare two-digit numbers using >, =, and <. (1.NBT.3) Add within 100. (1.NBT.4.) Given a two-digit number, mentally find 10 more or less without counting. (1.NBT.5) Subtract 10 from multiples of 10 (10-90). (1.NBT.6)
- Place Value: the value of the place of the digit in a number
- Digit: A symbol used to show a number
- Greater Than: (>) a symbol used to compare two numbers, with the greater number listed first. Example: 8 > 6
- Less Than: (<) a symbol used to compare two numbers, with the lesser number given first. Example: 6 < 9
- Equal to: (=) having the same value
- Add: To join together sets to find the total or sum
- Subtract: to find the difference when two groups are compared or to
find out how many are left when items are taken away from a group
Activities At Home
- Count objects such as jellybeans in a bowl, pennies in a jar, cheerios in a baggie, etc.
- Find numbers in newspapers, magazines, or on items around the house.
- Practice counting with your student while doing various activities-driving in the car, jumping rope, waiting in line at a store, etc.
- Divide a deck of cards evenly between players. Each player flips over a card, the player with the highest card wins the cards. Continue until one player has all cards in the deck.
- Put different items into groups and talk about which group has more or less items using the terms greater than and less than.
- Roll dice and create numbers. Say what is 10 more or 10 less than that number.
Learning LinksFirst Grade Operations and Algebraic Thinking
What Your Child Will Learn
Add and subtract within 20 to solve word problems. (1.OA.1) Add three whole numbers to solve word problems. (1.OA.2) Use properties of operations to add and subtract. (1.OA.3) Understand subtraction as an unknown-addend problem. (1.OA.4) Relate counting on or back to addition and subtraction. (1.OA.5) Add and subtract within 20 and fluently within 10. Use strategies to add and subtract. (1.OA.6) Understand the meaning of the equal sign and determine if equations are true. (1.OA.7) Find the missing number in an addition or subtraction equation. (1.OA.8)
- Addition: To join two or more groups. 2 + 3 =
- Subtraction: To find the difference when two groups are compared or to find out how many are left when items are taken away from a group.
- Equation: a mathematical statement containing an equal sign, to show that two expressions are equal
- Addend: Any numbers being added together (Example: 3 + 4 = 7, 3 and 4 are the addends)
- Count On: start from any given number and count forward
- Count Back: start from any given number and count backwards
- Equal sign (=): A symbol used to show that two amounts have the same value.
384 = 384
- Sum:The answer to an addition problem. In 2 + 3 = 5, 5 it is the sum.
- Difference: The answer to a subtraction problem. In 8 – 3 = 5, 5 is the difference.
- Number Sentence: A sentence that includes numbers, operation symbols ( +,- ), and a greater than or less than symbol ( >,< ) or equal sign. 5 + 3 = 8 25 < 32
Activities At Home
- Roll single digit numbers and add them together.
- Roll 2-digit or 3-digit numbers and add them together.
- Add all the digits of your house number together.
- Make a train with Legos or colored blocks. Write a number sentence for the different colors in the train.
- Add the price of two items at a store.
- Compare gas prices to find the lowest amount.
- Start with 20 counters (beans, pennies, etc.) and roll two dice to make a 2-digit number. Subtract counters until you get to 0.
- Give your student an addition or subtraction number sentence and ask them to make up a story problem to go with the number sentence.
- Make a physical array with counters and record on paper using symbols.
Ten Frames Number Puzzles Adding on a Number Line Grouping in 5's and 10's Place Value Blocks Make Combinations of Ten Sum Sense Missing Addends Equal or Not Equal Addition and Subtraction Word Problems Adding on a Number Line Number Line Basic Fact Practice Tom and Jerry Addition Addition Trimathlon Subtraction Shoot-Out Subtraction Harvest Cone Crazy Subtraction Snagger's Pond Subtraction Flashcards Hidden Picture Ladybug Subtraction Minus Mission Island Chase Subtraction Machine Math Magician Math Baseball Addition Monster Ghost Blasters 2 Addition is Fun Addition Surprise Dinosaur Dentist Addition Flashcards
Last Modified on March 7, 2017