Choose the Operation Addition and Subtraction

When we have an equation that contains adding and subtraction, we

• always solve subtraction first

• always solve addition first

• solve it from right to left

• solve it from left to right

36 + 18 - 19

What do we solve first?

• 18 - 19

• 36 + 18

51 - 35 + 12

What do we solve first?

• 51 - 35

• 35 + 12

67 - 13 + 22 =

37 - 33 + 91 =

89 + 13 - 56 =

55 + 44 + 11

76 - 32 - 11 =

34 - 28 + 99 =

55 + 54 - 98 =