## Presentation on theme: "Written Addition – Objectives"— Presentation transcript:

Use column addition to add pairs of numbers with one or two decimal places; Choose a method to add whole or decimal numbers. You will need: Mini whiteboards © Hamilton Trust Keeping Up Term Week 7 Day 3

Step 1: Write the numbers in columns, one above the other. 10s 1s s . Step 2: Add the tenths column. Write the extra 1 in the 1s column. 10s 1s s 1 . 2 Remind students how they can use column addition to add pairs of numbers such as Carefully talk through the carrying of the 1 from one column to the next. Hints: Leave a space before drawing the lines. Write the decimal point in the answer so you don’t forget it later. © Hamilton Trust Keeping Up Term Week 7 Day 3

Step 3: Add the 1s, including the extra one. Write the extra ten in the 10s column. 10s 1s s 1 1 Step 4: Add the tens column. 10s 1s s 1 1 Carefully talk through the carrying of the 10 from one column to the next. © Hamilton Trust Keeping Up Term Week 7 Day 3

Fab 5s & Tasty 2s Make a pair of three-digit numbers, each with one decimal place, and add them together. 9 7 5 3 2 1 8 4 6 Students write on mini whiteboards or in back of books. Partners check each other’s addition. Discuss as necessary. Watch out for students who: Make place value errors when using a written method (return to the expanded layout if necessary). You score a point for every 2 or 5 in your answer! © Hamilton Trust Keeping Up Term Week 7 Day 3