Weds 16th Jan – More work on Estimating

LEARNING OBJECTIVE: To use estimations to help work out approximate answers to problems

SUCCESS CRITERIA: You will be able to solve problems quickly using estimations

STARTER: Write down the approximate answers to the following questions

1. 47 x 89
   
2. 36 x 117
   
3. 237 x 450
   
4. 790 ÷ 38
   
5. 178 ÷ 47
   
6. (43 + 27) x 28
   
7. (217 – 48) x 12.3
   
8. (645 x 28) ÷ (34.7 + 62.3)
   
9. 23 packets of crisps at 53p per packet
   
10. 2 magazines at £3.45 each plus a 90p Newspaper for 6 days
    

Use a calculator to work out the exact answers to answer all of the above

LESSON: Check answers to starter questions and use those to revise approximations. Introduce the idea of rounding to nearest 10,100, 1000 via this MyMthas Lesson, Use question screens repeatedly if necessary.

Have a go at these problems

PLENARY: Checking answers, feedback on confidence from students.