Envision Topic 10 Adding Numbers to 1,000

Use mental math to solve. 790 + 10 = ____

Use mental math to solve. 790 + 100 = ____

Bob plays a game. He scores 473 points. Bob plays again and scores 100 points. How many points did Bob score in both games?

Which equations matches the open number line?

• 481 + 100 = 603

• 481 + 603 = 122

• 481 + 122 = 603

• 481 + 120 = 603

Which equation matches the open number line?

• 284 + 231 = 515

• 284 + 514 = 200

• 284 + 221 = 515

• 284 + 200 = 504

156 children in a school are girls. 148 children in that school are boys. How many children go to that school?

Add using any strategy.

378 + 142 = ___

Which strategy is shown to add three-digit numbers?

• open number line

• mental math

• partial sums

• models

349 people are on a boat. 255 people are on another boat. How many people are on both boats?

Which strategy is shown to add three-digit numbers?

• open number line

• mental math

• partial sums

• models