When multiplying two negative numbers, the product will be positive. The correct answer is 77.

Multiplication can be thought of as repeated addition, or as objects in a group.

means adding ten times.

and

Or we can think of this as grouping objects. We have groups, with objects in each group. We can count up the total number of objects, in this case triangles.

Multiplication can be thought of as repeated addition, or as objects in a group.

means adding one time.

and

Or we can think of this as grouping objects. We have group, with objects in each group. We can count up the total number of objects, in this case triangles.

Multiplication can be thought of as repeated addition, or as objects in a group.

means adding two times.

and

Or we can think of this as grouping objects. We have groups, with objects in each group. We can count up the total number of objects, in this case triangles.

Multiplication can be thought of as repeated addition, or as objects in a group.

means adding nine times.

and

Or we can think of this as grouping objects. We have groups, with objects in each group. We can count up the total number of objects, in this case triangles.

Multiplication can be thought of as repeated addition, or as objects in a group.

means adding ten times.

and

Or we can think of this as grouping objects. We have groups, with objects in each group. We can count up the total number of objects, in this case triangles.

Multiplication can be thought of as repeated addition, or as objects in a group.

means adding five times.

and

Or we can think of this as grouping objects. We have groups, with objects in each group. We can count up the total number of objects, in this case triangles.

Multiplication can be thought of as repeated addition, or as objects in a group.

means adding three times.

and

Or we can think of this as grouping objects. We have groups, with objects in each group. We can count up the total number of objects, in this case triangles.

Multiplication can be thought of as repeated addition, or as objects in a group.

means adding eight times.

and

Or we can think of this as grouping objects. We have groups, with objects in each group. We can count up the total number of objects, in this case triangles.

Multiplication can be thought of as repeated addition, or as objects in a group.

means adding five times.

and

Or we can think of this as grouping objects. We have groups, with objects in each group. We can count up the total number of objects, in this case triangles.