# Addition and Subtraction to 18 quiz

We will be having a quiz on our math unit addition and subtraction to 18 on Friday, February 13th.

These are the things that the students are expected to be able to do;

• add and subtract to 18
• -be able to use the 3 mental math strategies we have learned ( +1 and +2 as well as -1 and -1, making10, doubles and doubles +1)
• – be able to tell if an equation is equal or not equal
• – be able to write a fact family for a set of numbers
• – be able to answer a story problem with a number sentence and a word sentence
• – be able to find the missing number in an addition or subtraction equation
• – be able to balance 2 equations

I sent home the children’s math books yesterday so that you will know what type of questions to answer. I will be sending home a pink note today that explains the mental math strategies we have learned. Tomorrow I will send home the review booklet that we have worked on at school today and tomorrow.

This is an essential unit for grade 2 math. It is important that the children have a solid base of math facts to 18 in their memory to help ease the transition into addition and subtraction to 100 when we begin that unit in mid-March.