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### How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

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### 98 Cards in this Set

• Front
• Back
 4 + 16= 20 2 + 19= 21 2 + 18= 20 2 + 15= 17 2 + 14= 16 2 + 13= 15 2 + 12= 14 2 + 10= 12 1 + 20= 21 1 + 19 20 1 + 18= 19 1 + 17= 18 1 + 16= 17 1 + 14= 15 1 + 13= 14 1 + 12= 13 1 + 11= 12 0 + 20= 20 3 + 19=(Hint: Same as 20 + 2) 22 3 + 18= 21 3 + 17= 20 3 + 16= 19 3 + 15= 18 3 + 14= 17 3 + 13= 16 3 + 12= 15 3 + 11= 14 4 + 10 14 3 + 20= 23 3 + 10 13 2 + 20= 22 1 + 10= 1 4 + 11= 15 4 + 15= 19 4 + 14= 18 4 + 13= 17 4 + 12= 16 4 + 20= 24 4 + 19 = (Hint: Same as 3 + 20) 23 4 + 18 22 4 + 17= 21 0 + 14= 14 0 + 16= 16 1 + 0= 0 2 + 0= 2 2 + 1= 3 3 + 0= 3 3 + 1= 4 3 + 2= 5 4 + 0= 4 4 + 1= 5 4 + 2= 6 4 + 3= 7 2 + 11= 13 0 + 11= 11 0 + 12= 12 0 + 13= 13 1 + 15= 16 0 + 19= 19 0 + 18= 18 0 + 17= 17 0 + 16= 16 0 + 15= 15 0 + 14= 14 2 + 17= 19 2 + 16= 18 0 + 10= 10 0 + 9= 9 0 + 8= 8 0 + 7= 7 0 + 6= 6 0 + 5= 5 0 + 4= 4 0 + 3 = 3 0 + 2= 2 0 + 1= 1 4 + 9=(Hint: Same as 10 + 3) 13 3 + 9=(Hint: same as 2 + 10) 12 3 + 8= 11 3 + 7= 10 3 + 6= 9 3 + 5= 8 3 + 4= 7 2 + 9= 11 2 + 8= 10 2 + 7= 9 2 + 6= 8 2 + 5= 7 2 + 4= 6 2 + 3= 5 1 + 9= 10 1 + 8= 9 1 + 7= 8 1 + 6= 7 1 + 5= 6 1 + 4= 5 1 + 3= 4 1 + 2= 3