To add two-digit numbers, first add the ones (regrouping if necessary) and then add the tens. To add 24 + 38, start by moving 4 beads and another 8 beads. Notice the moved beads can be regrouped as 1 ten and 2 ones. Finally, move 2 tens and 3 tens. There are 6 tens and 2 ones, so 24 + 38 = 62.
Adding Two-Digit Numbers 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.
Brainingcamp produces virtual manipulatives for iPads, Chromebooks, PCs, and Macs.