Math this week

Math

Grade Ones

This week we continued to look at addition strategies.  The strategy that we focussed on was the doubles strategy.  Knowing doubles leads to students being able to use the doubles strategy for addition to master facts such as 6+7 (6+6+1).  It also will help with future math concepts such as the 2x tables in multiplication and fractions.

Here are some questions you can ask your child to reinforce their learning: 

• What is the strategy called when you are adding the same number together? 
• How do you use a double to add 5 + 6?
• What are examples of doubles in real life? Here are some to get you started.
• 1+1 (eyes)
• 2+2 (dog's legs)
• 3+3 (soda)
• 4+4 (spider's legs)
• 5+5 (hands)
• 6+6 (eggs)
• 7+7 (calendar)
• 8+8 (crayon box)
• 9+9 (18 wheeler truck)

Please practice doubles at home with your child.  (1+1, 2+2, 3+3...up to 9+9) using dice, playing cards, or flashcards.   You can also check out the Doubles Trouble Post on this blog!

Grade Twos

This week we looked at the addition of two digit numbers using breaking numbers apart and making ten. The goal is to see if the numbers can be broken apart to make a ten and work toward mental math.  For example, since students know 4 + 6 = 10, then they also know 40 + 60 = 100. Or, they might notice that in 27 + 43, the ones place (7 & 3) is a fact that makes 10.   Or 37 + 6  => 37+3= 40+3=43.    
                                                            /\
                                                          3+3

Here are some questions you can ask your child to reinforce their learning: 

• How can making 10 help you to add a two digit number?
• How do you know which numbers to break apart?
• Can you solve a question, 36+44, using the making 10 strategy?
• Why is using a making 10 a helpful strategy when adding two digit numbers?

Students can continue to practice their basic math facts to 18 in order to support their addition of two digit numbers.  You can check out the Double Digit Addition Tic-Tac-Toe.