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Objectives: Make and justify estimates and approximations to calculations. Use a calculator efficiently and effectively using BODMAS. Vocabulary:

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Presentation on theme: "Objectives: Make and justify estimates and approximations to calculations. Use a calculator efficiently and effectively using BODMAS. Vocabulary:"— Presentation transcript:

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3 Objectives: Make and justify estimates and approximations to calculations. Use a calculator efficiently and effectively using BODMAS. Vocabulary:

4 2.1 x x x x x x x x x 9.1 Estimate the answer to each multiplication in the target board and find an answer to match in the ovals around the edges W/S 4.1B

5 2.1 x x x x x x x x x 9.1 Answers:

6 Identify the order of the operations in the equations below – colour the operation (+ - x or ÷) box as given in the key. 1st2nd3rd Example: x 5= x 5= x 5= Remember BODMAS rule.

7 1st 2nd 3rd = = = = = = x x x x x x W/S4.2B

8 4 3 2 = = = = = = x x x x x x M4.2(B) Answers:

9 Remember the BODMAS rule to find the answers to the questions below. ( ) x 4 = 3 x = ( ) x 3 = 2 x ( ) = x = 17 x ( ) = M4.3B

10 Remember the BODMAS rule to find the answers to the questions below. ( ) x 4 = 3 x = ( ) x 3 = 2 x ( ) = x = 17 x ( ) = M4.3(B)

11 ( ) x 14 = 23 x = ( ) x 32 = 24 x ( ) = 17 x ( ) = x = M4.4B

12 ( ) x 14 = 23 x = ( ) x 32 = 24 x ( ) = 17 x ( ) = x = M4.4(B)

13 For each of the questions below show clearly whether you used a mental, written or calculator method: a.( ) x 4.3b. 12 x 9 – 13 x 7 c ÷ ( )d. ( )² e x 8f. 3.8² – 7 x 2 5² g ÷ ( ) W/S4.5B

14 Answers: a.( ) x 4.3 = 10 x 4.3 = 43 b.12 x 9 – 13 x 7 = 108 – 91 = 17 c.38.4 ÷ ( ) = 6 d.( )² = e x 8 = – 7 x 2 f. 3.8² + 6 = ² g ÷ ( ) = (to 3 d.p.) mentally written calculator

15 Objectives: Make and justify estimates and approximations to calculations. Use a calculator efficiently and effectively using BODMAS. Vocabulary:

16 Thank you for your attention


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