Similarly, in Row #2, when we add all numbers, we get a total of 10. With same logic, when add we add all numbers in this row, we should get a total of 10 too. So, we have 2 + 5 + 1 which equals to 8 ...
Practice adding and subtracting within 20 using a Double 10-frame & number line. Represent a teen number using a number bond to solve a Mystery Math Mistake. Use Notice and Wonder with a marble game ...
Add the RHS of the previous line to the LHS of the next line. Start reading in an anti-clockwise direction from the top of each triangle. In the first triangle, the largest factor of 9 is 3, then the ...
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