+/- fractions butterfly technique
טריק פרפר
Step 1. Draw wings
Step 2. Draw body over operation sign
Step 3. Draw plus or minus (depending on addition or subtraction) sign for antenna
Step 4. Draw multiplication sign for tail
Step 5. Multiply the wings
APPLY THE OPERATIONS IN THE HEAD AND THE TAIL
Step 6. Use head to add (or subtract) wings
Step 7. Multiply the tail
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