Math facts can be learned in a number of ways, but can be difficult for some youngsters. This set includes number bond cards for addition and subtraction and part-whole cards. The cards measure 5 inches square and are made of sturdy, glossy cardstock. There are a few blank cards in each set for making your own combinations.
The number bond cards (80 in the set) are more than flash cards; they show the relationship between addition and subtraction facts. The front of each card presents a diagram with 3 boxes: one box is outlined with a dotted line. The dot-outlined box shows the sum of the other two boxes; the dot-outlined box might instead show one of the addends. The digits you see can be used to explain both the functions of addition and subtraction. The reverse side of the number bond cards show the same diagram as the front, but the dot-outlined number is missing; children name the missing number.
Part-whole cards (80 cards in the set) show the parts of the whole number. The top half of the card shows the larger number and the bottom half of the card shows the numbers used to make the larger number (for example, 4 and 5 at the bottom and 9 at the top); the cards represent combinations up to 10. The back of each card shows the same number combinations, but one number is missing: children determine the missing number.
Help your children learn their math facts but also understand the relationship between functions with these helpful card sets. ~ Donna