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Quickname: 8802
Suitable for K-12 grades: Grade 1 Grade 2 Grade 3
Elementary School, Primary School.
Add and sub sibling numbers in the range from 1 to 100
Sibling numbers are numbers whose sum is ten.
This task is used to train sibling numbers that add up to ten.
For this purpose, problems are presented where a two-digit number and a one-digit number must be added or subtracted. With addition, the next tenner is reached, with subtraction the first number is itself a tenner.
It is selectable whether all numbers (1-9) or only a certain number is to be trained. In addition, a trick question can be scattered where the above conditions do not apply.
Topics: Arithmetic Number spaces Whole Numbers
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