Remember: Add the tens and the ones on their own rows. The order does not matter.
Questions
1
Which number has two tens and five ones?
fifty-twoforty-threetwenty-five
2
Which number has four tens and three ones?
forty-threesixty-eightfifty-two
3
Which number has six tens and eight ones?
sixty-eightthirty-sixfifty-two
4
Which number has seven tens and one one?
fifty-twoseventy-onesixty-eight
5
🔟Does adding the tens first get the true answer?
YesNo
6
Which way does not get the true answer?
🔀adding ones to the tens row🥇adding the ones first🔟adding the tens first
7
🙈Does adding only the tens get the true answer?
YesNo
8
Which way gets the true answer?
🪜adding row by row🙈adding only the tens🔀adding ones to the tens row
9
Which way gets the true answer?
🔀adding ones to the tens row🥇adding the ones first🙈adding only the tens
10
Which way does not get the true answer?
🔀adding ones to the tens row🪜adding row by row🥇adding the ones first
11
Which number has four tens and three ones?
sixty-eightforty-three
12
Which way gets the true answer?
🔀adding ones to the tens row🥇adding the ones first
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Answer key · Set C
Adding two-digit numbers
1twenty-five
2forty-three
3sixty-eight
4seventy-one
5Yes
6adding ones to the tens row
7No
8adding row by row
9adding the ones first
10adding ones to the tens row
11forty-three
12adding the ones first
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