HP 40gs hp 40gs_user's guide_English_E_HDPMSG40E07A.pdf - Page 32

hp40g+.book Page 20 Friday, December 9, 2005 1:03 AM Example Calculate -2--3----2---------1---4--------8- ln (45) : -3 23 14 8 3 45 Long results Negative numbers Scientific notation (powers of 10) Example If the result is too long to fit on the display line, or if you want to see an expression in textbook format, press to highlight it and then press . Type to start a negative number or to insert a negative sign. To raise a negative number to a power, enclose it in parentheses. For example, (-5)2 = 25, whereas -52 = -25. A number like 5 × 104 or 3.21 × 10-7 is written in scientific notation, that is, in terms of powers of ten. This is simpler to work with than 50000 or 0.000000321. To enter numbers like these, use EEX. (This is easier than using 10 .) Calculate -(--4----×-----1---0-------1--3---)--(---6----×-----1---0---2---3--)3 × 10-5 4 EEX 13 6 EEX 23 3 EEX 5 Explicit and implicit multiplication 1-20 Implied multiplication takes place when two operands appear with no operator in between. If you enter AB, for example, the result is A*B. Getting started