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It's best to convert those numbers from scientific notation to normal notation; that makes it easy to add them. After adding them, you can convert back to scientific notation if you want. Another option is to keep the numbers in scientific notation, but to convert them so that both have the same exponent.
The steps, in order, will depend on what you wish to do: convert from normal to scientific notation, the converse, perform one of the basic operations of arithmetic on numbers in scientific notation.
No. It is the same as when you subtract normal numbers. a - b is not the same as b - a. However, if you convert the subtraction to an addition, you can use the commutative law - both with normal subtraction and with vector subtraction. That is, a - b, which can be written as a + (-b), is the same as -b + a.
Each place value column in a binary number can have only one of two values: 0 or 1; thus the counting numbers in binary are:1, 10, 11, 100, 101, 110, 111, 1000, 1001, 1010, 1011, 1100, 1101, 1110, 1111, 10000, 10001, 10010, ...To product (or multiply) binary numbers, use long multiplication like normal, but when adding the columns together remember how binary counting goes (above) which means you may carry more than 1, in which case carry to more than one column, eg if the sum is 101 put a 1 under the column, carry 10 to the previous 2 columns (ie 0 to the next left column and 1 to the column to the left of that one).example 1111 × 101 = 1001011 (in decimal 15 × 5 = 75)---------------------------------------------------------------------------------------------------------------------------If you meant to produce binary numbers, that is convert decimal to binary, then the general algorithm to convert between bases works:divide the number by the new base to get a whole number quotient and a remaindernote the remainderreplace the number by the quotientif the number is not zero repeat from step 1write the remainders in reverse order to get the original number in the new base.For binary, the new base is 2.Example 75 in binary:75 ÷ 2 = 37 r 137 ÷ 2 = 18 r 118 ÷ 2 = 9 r 09 ÷ 2 = 4 r 14 ÷ 2 = 2 r 02 ÷ 2 = 1 r 01 ÷ 2 = 0 r 1→ 75 in binary is 1001011To convert from binary to decimal remember that each place value column of a binary number has twice the value of the column to its right; add the value of each column by its binary digit (bit).eg 1001011 = (1 × 64) + (0 × 32) + (0 × 16) + (1 × 8) + (0 × 4) + (1 × 2) + (1 × 1) = 64 + 8 + 2 + 1 = 75It may be easier to start from the right hand end of the number and work left as then you start with the place column value of 1 and multiply it by 2 each time:eg 1001011 = (1 × 1) + (1 × 2) + (0 × 4) + (1 × 8) + (0 × 16) +( 0 × 32) + (1 × 64) = 1 + 2 + 8 + 64 = 75