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