# Unit 3 - Real World Problems (Difference Unknown) Practice Sheets      Subject
Resource Type
File Type

PDF

(4 MB|17 pages)
Standards
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Real World Problems is a HUGE and very important unit in 1st grade. This freebie includes 3.2 which is just finding the unknown number (difference only). The resources included are practice problems that include strategy mats for students and teachers. The strategies on the mats are ten frames, number line, draw a picture, and part-part-whole. Students are even given a box to write the equation. This is an excellent resource to display on the board or to give every student a copy of the problem. It allows students to show their work and gives them the opportunity to solve using multiple strategies.

Students can also use the success criteria and learning targets at the top of each page to check if they are being successful. Did they find the unknown number? Teaming questions are also included and students have to determine what strategy is the best for solving the word problem.

This section comes with 15 practice problems with the strategy mats.

This is just part 2 out of 7.

Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = ▯ - 3, 6 + 6 = ▯.
Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. For example, which of the following equations are true and which are false? 6 = 6, 7 = 8 - 1, 5 + 2 = 2 + 5, 4 + 1 = 5 + 2.
Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).
Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).
Understand subtraction as an unknown-addend problem. For example, subtract 10 – 8 by finding the number that makes 10 when added to 8.
Total Pages
17 pages
Does not apply
Teaching Duration
N/A
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