Remember: Look at the ones row. Four or fewer fall back. Five or more slide up.
Questions
1
Does thirty-one round to seventy when we round to the nearest ten?
YesNo
2
Does thirteen round to thirty when we round to the nearest ten?
YesNo
3
Which number rounds to fifty when we round to the nearest ten?
thirty-sevenninety-onefifty-four
4
Which number does not round to forty?
thirty-sevenseventy-sevenforty-one
5
Which number does not round to twenty?
seventeenfifty-fivetwenty-four
6
Which number rounds to twenty when we round to the nearest ten?
forty-fourninety-fourseventeen
7
Which number rounds to eighty when we round to the nearest ten?
seventy-fiveninety-onefifty-four
8
Which number does not round to twenty?
twenty-fourseventeenseventy-two
9
Which number rounds to sixty when we round to the nearest ten?
sixty-eightfifty-eightforty-one
10
Does twenty-six round to fifty when we round to the nearest ten?
YesNo
11
Which number rounds to seventy when we round to the nearest ten?
seventeenseventy-foureighty-two
12
Which number rounds to seventy when we round to the nearest ten?
seventy-twotwenty-twoeighty-five
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Answer key · Set C
Rounding on the abacus
1No
2No
3fifty-four
4seventy-seven
5fifty-five
6seventeen
7seventy-five
8seventy-two
9fifty-eight
10No
11seventy-four
12seventy-two
Mark each answer, count the right ones and write the score on the sheet.