Today we discovered something about addition problems. We learned that we can put addends in any order and we will still get the same sum. I wonder if the same is true for subtraction. Knowing what you know about addition and subtraction, Turn and Talk to your Shoulder Partner. Discuss whether or not you think the order of the numbers matters in a subtraction problem. I will give you a problem to think and talk about. I’m going to give you about one minute, but give me a Thumbs Up when you are ready to share.
Math4u grade 2 first term
ماث فور يو جريد 2
لمشاهدة شرح دروس ماث جريد 2 الترم الاول المنهج الجديد بأسلوب سهل وبسيط
أضغط على الرابط التالى
لمشاهدة شرح دروس ماث جريد 2 الترم الاول المنهج الجديد بأسلوب سهل وبسيط
أضغط على الرابط التالى
Mathematics primary 2
TEACHER DO: Write 15 – 10 = _____ on the board.
STUDENTS DO: Share their thinking with their Shoulder Partner. Give a Thumbs Up when ready. Selected students share their thinking with the whole group.
TEACHER DO: Listen to students’ ideas. If no students correctly respond to the question, write the subtraction problem with the numbers switched. Th en try to solve the new problem using the 120 Chart. Students should see that in a subtraction problem, the order of the numbers matters.
TEACHER SAY: Great thinking. Although the order of the addends in an addition problem does NOT matter, the order of the numbers in a subtraction problem DOES matter. We will talk more about this again.
