Add the tens and the ones on their own rows. The order does not matter.
Every number comes apart into tens and ones, and each has its own row on the frame.
Add tens to tens on the top row, and ones to ones on the bottom row.
Tens first or ones first, the answer is the same.
A row with no beads is zero, so an empty row simply fills up.
These are some of the questions on the sets. The printable sheets have more, with the bead frame drawn for each, and an answer key.
78. 5 tens and 2 tens are 7 tens. 1 one and 7 ones are 8 ones.
96. 3 tens and 6 tens are 9 tens. 4 ones and 2 ones are 6 ones.
88. The ones row starts empty. 5 tens and 3 tens are 8 tens, and 0 and 8 ones are 8 ones.
78. 4 tens and 3 tens are 7 tens. 6 ones and 2 ones are 8 ones.
Pick two numbers under fifty with no carrying, like twenty-four and thirty-five. Ask a grown-up to count them all, one by one, while you add the tens and the ones on their own, and see who finishes first. Then swap jobs!
Let your child say it aloud as they slide the beads: say the tens, say the ones, check it makes sense.
