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Winter vacation homework, the answer to the second question on page 36, mathematics in the third grade of primary school.
Fill in the numbers 7, 8, 9, 10, 1 1, 12, 13, 14 and 8 in' 10; Add the numbers in three adjacent squares of each horizontal line and vertical line to get 3 1.
Question supplement: that+. -Just fill in the numbers. The front number 5 is a+ shape, and the back number 3 is an a- shape. Just fill in eight numbers. Homework.