Today we learned how to do the checking trick. The checking trick goes like this:
812 + | 2
318 = | 3
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1130 5 | 5
I will show you an instruction sheet on what you are reading right now.1
I am looking forward to winter because I LOVE snow and cold weather. But I am not used to it.
1 Of course, Maya had a worksheet that she brought home from school that explained all of this. But then she took it back to school. But, basically, they taught them about digit sums. Add up the digits in the to operands. If the sum is larger than 9, do it again and continue until the number is less than 10. So 8+1+2=11, 1+1=2. And 3+1+8=12, 1+2=3. Those are the numbers in the right hand column; sum them to get the number at the bottom (repeating again if you have a number over 9). Once you're done with your addition the normal way (so add 812+318), add up the digits in the sum. So 1+1+3+0=5. Then the check is to verify that the two results are the same.
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