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- >4.Editing a simple expression.
- x=-2x-3x+5
- MYSZEK 2xyDEMO
- EXAMPLE
- e
- t101
- p10
- t0
- F
- zrm
- k+
- k+m
- kC
- cxm
- k=m
- k-m
- c3m
- cxm
- k-m
- c2m
- cxm
- k+m
- c5m
- kS
- slm7
- F
-
- kx
- t1
- p3
- t0
- kx
- t2
- p3
- t0
- kxm
- kb
- t3
- p3
- t0
- kbm
- kS
- t5
- p3
- t0
- ;kSm
- ssm
- t7
- p5
- t0
- slm
- slm
- ssm
- t8
- p4
- t0
- spm2
- ssm
- t9
- p5
- t0
- spm
- spm
- spm
- spm
- ssm
- kc
- t10
- p6
- t0
- kcm
- kx
- t11
- p5
- t0
- kxm
- t12
- p3
- t0
- shm
- kv
- t13
- p5
- t0
- kvm
- t14
- p7
- t0
- slm2
- kb
- kbm
- k+m
- slm2
- k-m
- shm
- t18
- p4
- t0
- ssm
- spm6
- ssm
- t19
- p6
- t0
- c2m
- p1
-
- ze
- t102
- p10
- t0
- zxm
- zem
-
- e
- q
-
- BLURB
- 1`#To remove parts of expressions
- 1`#we can use &Delete& or &Backspace&.
- 2`#We press the &Delete& button to remove "$3"$.
- 2`#Notice the position of the cursor and the mouse.
- 3`#We press the &Backspace& button to remove "$-"$.
- 3`#Notice the position of the cursor and the mouse.
- 5`To mark blocks we use &Shift&+arrow keys.
- 7`#We press &Shift&+&left& arrow key
- 7`#(we can press the arrow many times).
- 8`We press any arrow "without" &Shift& to unmark the block.
- 9`#We press &Shift&+&right& arrow key
- 9`#to mark "$x-2x"$.
- 10`We copy the block to the clipboard.
- 10`#Notice the position of the mouse.
- 11`#We remove the block
- 11`#(&Delete& or &Backspace&).
- 12`We move the cursor to the beginning of the line ...
- 13`#and paste from the clipboard.
- 13`#Notice the position of the mouse.
- 14`#We have transfered the expression:
- 14`#"$x-2x"$
- 14`#to the other side of the equation.
- 14`#Now we change the signs.
- 18`We know that
- 18`#"$-x+2x+x=2x"$.
- 19`To replace
- 19`#"$-x+2x+"$ by the number "$2"$
- 19`we marked the block and now we press the &2& key.
-
- 101`#We learn how to edit expressions using 2xy.
- 101``#"The presentation proceeds automatically."
- 101``#To move yellow panels use the mouse.
- 101`#Press ENTER on the KEYBOARD to continue.
-
- 102`#In a moment the &Examples& window will appear.
- 102`You can watch the same presentation again, or
- 102`#load the next example, or
- 102`#close the window and solve your own problem.
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