Lesson 2, Section 1
... 2. If the two numbers have the ‘same’ sign, the answer is positive. 3. If the two numbers have ‘different’ signs, the answer is negative. 4. If there are more than two numbers, count the number of negatives. If odd, the answer is negative; if even, the answer is positive. a a a ...
... 2. If the two numbers have the ‘same’ sign, the answer is positive. 3. If the two numbers have ‘different’ signs, the answer is negative. 4. If there are more than two numbers, count the number of negatives. If odd, the answer is negative; if even, the answer is positive. a a a ...
Sequences
... You get the sequence 1,2,3,…. on the "strip" at the right Drag this strip to the left most position of the "workspace" Drag the multiplication-sign (an asterix) to the position right of the strip. Change the big 5 on the right side to a 3. Drag this 3 to the position right of the multiplication-sign ...
... You get the sequence 1,2,3,…. on the "strip" at the right Drag this strip to the left most position of the "workspace" Drag the multiplication-sign (an asterix) to the position right of the strip. Change the big 5 on the right side to a 3. Drag this 3 to the position right of the multiplication-sign ...