Abacards® Subtraction Click your or arrow keys to move the card ahead! For your IPAD swipe the screen. Using Your Abacards ® Click and follow along using.

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Presentation transcript:

Abacards® Subtraction Click your or arrow keys to move the card ahead! For your IPAD swipe the screen. Using Your Abacards ® Click and follow along using your abacus. After each click say what you saw. Practice saying what you will see before you click! After using the Abacards ®, make up problems. Think!!!!!! Forward Backward

Abacards® Subtraction 4 10 = 24 – 10 – 4 – 4 = ? – 18 = ?

Abacards® Subtraction =18 + ? = – 18 = ?6 6 Mental math “Friendly”

Abacards® Subtraction 10 = 24 – = ? – 18 = ? Mental math “Friendly”!

Abacards® Subtraction – 7 = ? – 5 – 2 = ? 8 Mental math “Friendly”!

Abacards® Subtraction 15 – 7 = ?15 – = ? Mental math “Friendly”!

Abacards® Subtraction ? = – 7 = ?8 Mental math “Friendly”!

Abacards® Subtraction – 19 = 34 – = ? Mental math “Friendly”!

Abacards® Subtraction – 9 = 27 – = ? Mental math “Friendly”!

Abacards® Subtraction 15-9= (15-10) +1=6 27-9= (27-10) +1= = (34-20) +1= = (52-10) +2= = (66-30) +2=38 Subtract “Friendly” Number and Adjust!

Abacards® Subtraction 15-9= ?9+?=15? =1+5 = = ?9+?=27? = = = ?19+?=34? = = = ?8+?=52? = = = ?28+?=66? = = 38 Change subtraction to addition problem!