1. M May 56 000 000 2 significant figures 450.0062 3 significant figures 378 000 27.30.005 32 to nearest 1000to nearest tenthto nearest hundred thousandth to 1 dec pl to 5 dec pl to nearest million to nearest whole to 4 dec pl 56.0 to nearest tenth 3050 to nearest ten 0.004 07 to 5 dec pl 7002 4 significant figures 5.308 to 3 dec pl

2. M May Round each of the following to 3 significant figures 34 62973 579134745.6662.8369 173.920.00468390440.0496812.345 0.000 083 7647.7331.655919.92547 Round each of the following to 2 sig fig 8 776 34131.793258.691 832428 0.085 726129.320401.03635.67 34 60073 600135045.72.84 1740.0046890400.049712.3 0.000 083 847.731.79202550 8 800 0003226092 000430 0.08613020001.036

3. M May 300= 3 x 10 2 426= 4.26 x 10 2 6700= 6.7 x 10 3 54 300=5.43 x 10 4 501 040=5.0104 x 10 5 Write each of the following in standard form : 1. 1. 2730 2. 2. 35.9 3. 3. 42 398 4. 4. 670 5. 5. 1 000 000 6. 6. 23 456 7. 7. 70.6 8. 8. 377 9. 9. 7.3 10. 10. 4 = 2.73 x 10 3 = 3.59 x 10 1 = 4.2398 x 10 4 = 4.67 x 10 2 = 1 x 10 6 = 2.3456 x 10 4 = 7.06 x 10 1 = 3.77 x 10 2 = 7.3 x 10 0 = 4 x 10 0

4. M May Write in full: 4.23 x 10 4 5.32 x 10 2 7.89 x 10 6 2.1 x 10 3 5.2 x 10 0 7.5 x 10 4 Small numbers: 200 20 2 0.2 0.02 0.002 ……. 2 x 10 2 2 x 10 1 2 x 10 0 2 x 10 -1 2 x 10 -2 2 x 10 -3 0.064=6.4 x 10 = 42 300= 532= 7 890 000 = 2 100= 5.2= 75 000 - 2 0.000 047 = 4.7 x 10 - 5

5. M May Write in Standard FormWrite in full 12 533 0.0473 5.72 0.682 4 x 10 4 2.5 x 10 2 5.38 x 10 -3 4 x 10 0 = 1.2533 x 10 4 = 4.73 x 10 - 2 = 5.72 x 10 0 = 6.82 x 10 - 1 = 40 000 = 250 = 0.00538 = 4

6. M May EE or Exp on scientific calculator in place of x 10 n 5.3 03 on display means 5.3 x 10 3 5.3 x 10 3 x 2.7 x 10 4 = 5.3 Exp 3 x 2.7 Exp 4 1.431 x 10 8 5 x 10 3 x 3 x 10 4 = 5 x 3 x 10 3 x 10 4 = 15 x 10 7 = 1.5 x 10 x 10 7 without calculator / estimate 2.83 x 10 2 x 9.167 x 10 3 estimate3 x 9 x 10 2 x 10 3 27 x 10 5 = 2.7 x 10 6 = 2.594261 x 10 6 = 2.59 x 10 6 to 3 sig fig = 1.5 x 10 8

7. M May Estimate first, then calculate, round your final answer to 3 sig fig: 4.27 x 10 2 x 2.137 x 10 5 8.23 x 10 3 x 5.747 x 10 2 3.14 x 10 -1 x 1.666 x 10 -2 1.55 x 10 5 x 3.419 x 10 -3 2.27 x 10 8 x 2.936 x 10 7 7.63 x 10 1 x 5.143 x 10 5 9.14 x 10 -2 x 7.666 x 10 -4 7.25 x 10 -6 x 4.119 x 10 3 = 4 x 2 x 10 2 x 10 5 = 8 x 10 7 = 2 x 3 x 10 8 x 10 7 = 6 x 10 15 = 8 x 6 x 10 3 x 10 2 = 48 x 10 5 = 4.8 x 10 6 = 8 x 5 x 10 1 x 10 5 = 40 x 10 6 = 4 x 10 7 = 3 x 2 x 10- 1 x 10 -2 = 6 x 10 -3 = 72 x 10 -6 = 7.2 x 10 --5 = 6 x 10 2 = 28 x 10 -3 = 2.8 x 10 --2 = 9.12499 x 10 7 = 9.12 x 10 7 = 6.66472 x 10 15 = 6.66 x 10 15 = 47.29781 x 10 5 = 4.73 x 10 6 = 39.24109 x 10 6 = 39.2 x 10 6 = 5.23124 x 10 -3 = 5.23 x 10 -3 = 70.06724 x 10 -6 = 7.01 x 10 -5 = 5.29945 x 10 2 = 5.30 x 10 2 = 29.86275 x 10 -3 = 2.99 x 10 -2