1. LQ Are some addition methods better than others?RAG Key Words: Calculation, Operation, Accuracy,18-Feb-16 Starter Activity Look at the sets of questions. Look for the hardest questions that you are sure you can answer correctly and answer them. Then look for the hardest questions that you think you can answer correctly and answer them. Copy and complete the sentence by writing either I am starting this unit of work on level……… or I am starting this unit of work not yet at level 3.

2. Level 3Level 4Level 5Level 6 Number Calculations I can add and subtract three digit whole numbers using written methods. I can multiply and divide whole numbers by 10. I can multiply and divide two digit numbers by 2, 3, 4 5 or 10. When given a number sentence, I can create related sentences, e.g. If I know that 14 x 5 = 70, I also know that 5 x 14 = 70 and 70 ÷ 5 = 14 etc. I can carry out simple calculations involving negative numbers. I can add and subtract three (or more) digit numbers, including decimals, using a written method. I can multiply and divide whole numbers by 10 or 100. I can multiply a simple decimal by a single digit. I can multiply two digit whole numbers by a single digit whole number. I can divide by a single digit number. I can multiply and divide whole numbers and decimals by 10, 100 and 1000. I can multiply and divide any three - digit number by any two-digit number. I can order, add, subtract, multiply and divide negative numbers. I can carry out multiplications and divisions involving decimal numbers. Level 7 I can make and justify estimates and approximations of calculations, rounding to one significant figure. I understand and can use Standard Form. I am starting this unit of work ……………………………………….

3. Level 3 321 + 437 = 436 – 274 = 13 x 10 = 28 ÷ 4 = Level 4 12 + - 5 = 23.2 + 4.6 = 23 x 100 = 26 x 7 = 365 ÷ 5 = Level 5 2.4 x 1000 = 234 x 57 = -27 ÷ 3 = -2 - -5 = 221 ÷ 13 = Level 6 34.5 ÷ 2.3 =

4. Class Discussion – Words that you may use when working with..... Addition +

5. Choose a question that you can answer confidently. Write your answer on your mini whiteboard. You must show how you worked it out. 23 + 34239 + 42623.5 + 67.912.4 + 234.71

6. Class Methods 23 + 34

7. Class Methods 239 + 426

8. Class Methods 23.5 + 67.9

9. Class Methods 12.4 + 234.71

10. Longhill School Raise Money for the RNLI The RNLI have over 4500 volunteer members. Every volunteer needs to be trained in search and rescue techniques and life saving skills. Volunteers have to go on training courses and they need to have specialist equipment and clothing. In this lesson you will be using addition techniques to calculate the cost of some of these items.

11. Are some addition methods better than others? You must give reasons for your answer.

12. Tips I would give a friend to solve this problem are......... I have made a link between this topic and … To help me move forward, when I got stuck today, I …. Today I interacted with the teacher by …… Today I am still unsure about ……………… To fill in this gap I intend to ………… A barrier to my learning today was……….. I will try to overcome by ….. Today I explained to ………. how to ………….. Something I have learnt today about the way I learn is ……… At home, I need to look at ………………