A Rekenrek can be used to show a variety of subtraction strategies. Consider the difference 13 - 6. By "counting back", move 13 beads and then remove 6 beads one at a time. By "making a ten", move 13 beads and then remove 3 beads (to make a ten), and then remove another 3 beads. By "making a ten" another way, move 10 beads on the top row and 3 beads on the second row, then remove 6 beads from the top row. By "thinking addition", move 6 beads and then think how many beads should be added to make 13.
Subtracting within 20 using the Brainingcamp Rekenreks virtual manipulative.
Brainingcamp virtual manipulatives can be used anywhere with no setup, cleanup, or lost parts. They are highly effective at engaging today’s digital learners and helping them bringing abstract math concepts to life.
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