Use the addition table to answer the questions.

Question

Three sums that are next to each other are shaded on the addition table.

An addition table is shown. Three sums in a row are shaded. The sums are 8, 9, and 10.

Part A
Complete the sentences to explain the pattern shown in the table.

(1 point)
When I shade any 3 sums next to each other in the addition table and add the first and third sums, the total is
Choose
the sum in the middle.

This is true for
Choose
sum(s) in the addition table.



Question 2
Part B
Complete the equations that show the pattern from the addition table.

(1 point)

Choose
+ 10 =
Choose

Choose
x 9 =
Choose

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Answer 1

Part A: When I shade any 3 sums next to each other in the addition table and add the first and third sums, the total is the sum in the middle. This is true for any sum(s) in the addition table.

Part B:
8 + 10 = 18

9 x 9 = 81