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Abacus · Ages 7+ · Set B
Complements of 10
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Goal: 15 min
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Remember: Partners are two numbers that make ten, and tens partners make a hundred.

Questions

1
True or false? Eighty and ninety make one hundred.
TrueFalse
2
🖐️True or false? Five is its own partner for ten.
TrueFalse
3
Which two numbers are tens partners for one hundred?
Twenty and seventyFifty and fiftyTwenty and forty
4
Which two numbers are partners for ten?
Five and sixTwo and eightOne and two
5
Which two numbers are partners for ten?
Two and sevenThree and fiveThree and seven
6
Which two numbers are partners for ten?
Four and fiveFive and fiveThree and five
7
Which two numbers are tens partners for one hundred?
Ten and ninetyForty and seventyTwenty and thirty
8
Which two numbers are partners for ten?
Four and sevenTwo and nineFour and six
9
True or false? Forty and seventy make one hundred.
TrueFalse
10
Which two numbers are partners for ten?
Four and fiveFive and nineOne and nine
11
Which two numbers are tens partners for one hundred?
Ten and fiftyTwenty and eightyTwenty and ninety
12
🔢True or false? Every number to ten has one partner.
TrueFalse
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