2. INTEGERS.FDECIMALS.F 344.57 300612.006 26800 0.00006 28000 0.0005673 214742.3400 100000081.6000 0.0240 DIGITS WHICH ARE RELEVANT IN AN INTEGER OR A DECIMAL NUMBER 2 4 3* 2* 5 8 3 5 1 4 5 5 3 *  Special case

3. NOW…TRY THIS! 3.000 => 245.00 => 0.00320 => 0.000030 => 0.02 => 0.02004800 => 4.0061 => 2500 => 4 5 3 2 1 7 5 2 or 3 or 4 Depend on the question

4. Round off to 1, 2 and 3 s.f 234 0.00453 8 1 0.005 – 1 s.f 0.004 5 3 80.0045 – 2 s.f 0.004 5 3 8 0.00454 – 3 s.f

5. NUMBERS1 S.F2 S.F3 S.F 2536 31582 2.0672 0.006 1 6 7 0.71457 3 0002 5002540 3 0 000 3 2 0003 1 600 22. 1 2.07 0.006 0.00620.00617 0.7 0.710.715

6.  2.61 (1 S.F)  2.386 (2 S.F)  5217 (2 S.F)  5217 (3 S.F)  0.829 (2 S.F)  0.06127 (2 S.F)  0.12015 (3 S.F) NOW…TRY THIS!