Solved Exercises on Counting Lessons in Japanese in Grade 1

Master counting lessons in Japanese: addition and subtraction strategies with visual methods through these 3 detailed exercises.

Solution: Exercises 1 to 3
1 Counting lessons in Japanese
Exercise 1
In Japanese class, there are 3 lessons on Monday (月曜日, getsuyōbi) and 2 lessons on Wednesday (水曜日, suiyōbi). How many lessons are there in total for these two days?
Definition:

Counting lessons in Japanese: Finding the total number of language learning sessions by adding sessions from different days

Counting method:
  1. Count the lessons on each day separately
  2. Add the days together
  3. Find the total count
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📚
📚
+
📚
📚
=
5
月曜日 (getsuyōbi)
3 lessons
+
水曜日 (suiyōbi)
2 lessons
=
Total
5 lessons
Step 1: Count Monday's lessons

There are 3 lessons on Monday (月曜日, getsuyōbi)

Step 2: Count Wednesday's lessons

There are 2 lessons on Wednesday (水曜日, suiyōbi)

Step 3: Add both days

3 lessons + 2 lessons = 5 lessons total

3 + 2 = 5
Final answer:

There are 5 lessons in total for Monday and Wednesday.

Applied rules:

• Grouping: Separate lessons by day

• Addition: Combine quantities to find totals

• Counting: Count each lesson once

2 Cancelled Japanese lessons
Exercise 2
There were supposed to be 7 Japanese lessons this week (今週, konshū). 3 lessons were cancelled (キャンセル, kyanseru) because of school events. How many Japanese lessons will actually happen?
Definition:

Subtraction: Taking away cancelled lessons to find what remains

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📚
📚
📚
📚
📚
📚
-
❌
❌
❌
=
4
7
→
4
4
Step 1: Start with planned lessons

There were 7 Japanese lessons planned (計画, keikaku)

Step 2: Subtract the cancelled ones

3 lessons were cancelled (キャンセル, kyanseru)

Step 3: Calculate what remains

7 - 3 = 4 lessons will actually happen (実際, jissai)

7 - 3 = 4
Final answer:

There will be 4 Japanese lessons this week (今週, konshū).

Applied rules:

• Subtraction: Remove cancelled lessons

• Counting backwards: Move left on the number line

• Remaining: What is left after taking away

3 Added Japanese lessons
Exercise 3
The Japanese class has 4 lessons scheduled (予定, yotei). The teacher adds 3 more lessons (追加, tsuika). How many lessons are there now?
Definition:

Addition: Combining scheduled and added lessons to make a larger total

📚
📚
📚
📚
+
➕
➕
➕
=
7
4
→
5
6
7
7
Step 1: Count the original lessons

There were 4 lessons scheduled (予定, yotei)

Step 2: Add the new lessons

The teacher added 3 more lessons (追加, tsuika)

Step 3: Find the new total

4 + 3 = 7 lessons altogether

4 + 3 = 7
Final answer:

There are 7 lessons now.

Applied rules:

• Addition: Combining lessons to make a larger schedule

• Counting forward: Move right on the number line

• Total: The final amount after combining

Detailed Summary: Counting Lessons in Japanese

Definitions of Key Concepts

Counting Lessons in Japanese: A mathematical strategy for finding the total number of language learning sessions by using addition and subtraction methods. This helps determine how many lessons will actually occur.

Addition: Combining groups to find a larger total (when lessons are added)

Subtraction: Removing part of a group to find what remains (when lessons are cancelled)

Total: The final count after adding or subtracting.

Core Rules and Principles

Rule 1: Each lesson is counted exactly once in the total.

Rule 2: When lessons are added, use addition to increase the count.

Rule 3: When lessons are cancelled, use subtraction to decrease the count.

Step-by-Step Methods

  1. Identify the situation: Determine if lessons are being added (add) or cancelled (subtract)
  2. Count the starting number: How many lessons were there initially?
  3. Count the change: How many are being added or cancelled?
  4. Perform the operation: Add or subtract accordingly
  5. Verify the result: Does the answer make sense?

Examples - Simple to Advanced

Simple Example: 2 lessons + 1 added lesson

Starting: 2 lessons

Added: 1 lesson

Total: 2 + 1 = 3 lessons

Medium Example: 5 lessons - 2 cancelled

Starting: 5 lessons

Cancelled: 2 lessons

Remaining: 5 - 2 = 3 lessons

Advanced Example: 4 lessons, 2 added, 1 cancelled

Starting: 4 lessons

After additions: 4 + 2 = 6 lessons

After cancellations: 6 - 1 = 5 lessons

Tips, Tricks, and Common Pitfalls

Tip 1: Use your fingers to help count when adding or subtracting.
Tip 2: Draw books or Japanese characters to represent lessons when counting.
Tip 3: Use a number line to visualize adding (move right) or subtracting (move left).
Pitfall 1: Don't confuse addition with subtraction - added lessons mean add, cancelled lessons mean subtract.
Pitfall 2: Make sure to count the starting number correctly before adding or subtracting.

Key Notes for Memorization

  • Added lessons = ADD to the total
  • Cancelled lessons = SUBTRACT from the total
  • Each lesson is counted once in the total
  • Always start with the current number before adding or subtracting
  • The final number must be logical given the situation
  • Check your work by performing the opposite operation
Visual Counting Strategies for Japanese Lessons
Counting Lessons in Japanese
Addition and Subtraction Methods
Adding Japanese Lessons
📚
📚
📚
+
➕
➕

Original: 3 lessons

Added: 2 lessons

Total: 3 + 2 = 5 lessons

Cancelling Japanese Lessons
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📚
📚
📚
-
❌

Original: 4 lessons

Cancelled: 1 lesson

Remaining: 4 - 1 = 3 lessons

Weekly Japanese Schedule
📚
📚
📚
📚
+
➕
➕
-
❌

Original: 4 lessons

Added: 2 lessons

Cancelled: 1 lesson

Total: 4 + 2 - 1 = 5 lessons

Verification Method
Checking Your Work
Double Check

If you calculated 7 lessons but started with 5 and 3 were added, check: 5 + 3 = 8

You made an error - the correct answer is 8 lessons.

Always verify your calculations!

Counting Laws, Methods, Rules, and Definitions for Japanese Lessons
Counting Lessons in Japanese
Fundamental Counting Principles
Key definitions:

Schedule (予定, yotei): The total number of lessons planned

Added (追加, tsuika): When a new lesson is scheduled (requires addition)

Cancelled (キャンセル, kyanseru): When a lesson is removed from the schedule (requires subtraction)

Complete counting methodology:
  1. Observe (観察, kansatsu): Look at the current schedule carefully
  2. Identify (識別, shikibetsu): Determine if lessons are being added or cancelled
  3. Starting number (開始数, kaishi-sū): Count the initial lessons
  4. Change (変更, henkō): Count how many are being added or cancelled
  5. Calculate (計算, keisan): Add or subtract accordingly
Tip 1: Keep a calendar to track your lessons over time (時間, jikan).
Tip 2: Use different colors for additions and cancellations to stay organized.
Tip 3: Practice with different scenarios to build confidence.
Tip 4: Use visual aids like drawings to help understand the problem.
Counting laws: Each lesson is counted once in the total, addition increases the count, subtraction decreases the count.
Best practices: Record each change, verify calculations, use visual aids for complex problems.
Counting principles to remember:

• One-to-one correspondence: Each lesson gets one count

• Stable order: Numbers always come in the same sequence

• Cardinality: The last number tells how many in total

• Addition principle: Added lessons increase the schedule

• Subtraction principle: Cancelled lessons decrease the schedule

• Verification: Always check if the answer makes sense

Questions & Answers

Question: I'm learning Japanese and am confused about when to add and when to subtract when counting lessons. How can I remember the difference?

Answer: This is a common challenge when learning Japanese! Here are helpful strategies:

  • Keywords: Listen for "added" (追加, tsuika) and "cancelled" (キャンセル, kyanseru)
  • Actions: Use hand motions - thumbs up for adding, thumbs down for subtracting
  • Visual cues: Draw plus signs for additions and X marks for cancellations
  • Memory phrase: "More added, add to the plan" and "Some cancelled, take away"

Example: "2 lessons added" → 2 more coming in → ADD 2

"1 lesson cancelled" → 1 going away → SUBTRACT 1

Practice with simple scenarios until the pattern becomes clear!

Question: When there are multiple changes, like some lessons are added and some are cancelled, how do I solve it?

Answer: Tackle multiple changes step by step:

  • Start with the beginning number of lessons
  • Handle each change one at a time in order
  • Follow the rule: Added = ADD, Cancelled = SUBTRACT

Example: Start with 4 lessons

Step 1: 2 added → 4 + 2 = 6 lessons

Step 2: 1 cancelled → 6 - 1 = 5 lessons

Final answer: 5 lessons

Work through each change in the order it happens!

Question: How can I help my students visualize the concept of counting lessons in Japanese?

Answer: Use visual aids to make the concept tangible:

  • Manipulatives: Use small books or Japanese character tiles to represent lessons
  • Drawings: Have students draw books or Japanese kanji for lessons
  • Number lines: Show movement for adding (right) and subtracting (left)
  • Storytelling: Create narratives about lessons being added or cancelled in Japanese
  • Calendar activity: Mark dates with Japanese days of the week and add/remove as needed

For example: Give students 5 book counters representing lessons. Add 2 more (added) to show 5 + 2 = 7. Then remove 1 counter (cancelled) to show 7 - 1 = 6.

These visual tools help students understand the mathematical operations behind the scenarios!