Two-Step Addition and Subtraction in Real-World Scenarios

The video tutorial from Underwater Math reviews solving two-step real-world problems using addition and subtraction. It emphasizes the importance of identifying keywords to determine the necessary operations and demonstrates this through examples. The first example involves adding multiple earnings, while the second example involves subtracting expenses from total earnings. The tutorial concludes with tips on solving word problems effectively.

What are the keywords that help you decide whether to add or subtract in a problem?

• Altogether, left

• Multiply, divide

• Increase, decrease

• Sum, difference

Tags

CCSS.1.OA.A.1

Jimmy earned $237 in April, $186 in May, and $204 in June. What is the total amount he earned?

• $672

• $627.00

• $6270

• $627

Tags

CCSS.3.OA.D.8

Which of the following is NOT a correct way to add the three amounts Jimmy earned?

• 237 + 186 - 204

• 204 + 237 + 186

• 186 + 204 + 237

• 237 + 186 + 204

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

What is the first step in solving a problem where you need to find out how much money is left after spending?

• Divide the total earned by the amounts spent

• Multiply the amounts spent

• Add up the amounts spent

• Subtract the amounts spent from the total earned

Tags

CCSS.3.OA.D.8

Jimmy spent $296 on a TV and $342 on a computer. How much did he spend in total?

• $638

• $6380

• $638.00

• $683

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

After spending $638, how much money does Jimmy have left if he originally had $750?

• $112

• $1112

• $12

• $72

Tags

CCSS.3.OA.D.8

What is the key word in the problem that indicates you need to subtract?

• Total

• Left

• Altogether

• Sum

Tags

CCSS.1.OA.A.1

What should you do if a problem requires more than one step to solve?

• Guess the answer

• Ignore the extra steps

• Look for key words and perform each step in order

• Only perform the first step

Tags

CCSS.3.OA.D.8

Which place value should you start with when adding or subtracting numbers?

• Thousands place

• Tens place

• Ones place

• Hundreds place

Tags

CCSS.2.NBT.B.7

What is an important thing to remember when carrying over in addition?

• Carry over only in subtraction

• Always carry over to the next place value

• Carry over only if the sum is less than 10

• Never carry over

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5