1.1.2 Performing arithmetic operations

• What does division mean in mathematics?

  Sharing items equally
• How does number line subtraction work for 7 - 4?

  Start at 7, move 4 steps back
• What is the purpose of addition?

  To combine numbers
• Match the subtraction technique with its description:

  Column Subtraction ↔️ Align numbers vertically and borrow if needed

  Number Line Subtraction ↔️ Move backwards on the number line

  Estimating Subtraction ↔️ Round numbers to subtract
• What is the approximate difference of 88 - 22 using estimation?

  70
• What is the result of multiplying 15 by 12 using the grid method?

  180
• What is the result of 12 ÷ 3?

  4
• What is the fundamental concept of multiplication based on repeated addition?

  Multiplication is repeated addition
• What are some key techniques to make addition easier?

  Column addition, number line addition, estimating addition
• Subtraction involves adding numbers together

  False
• What is the definition of subtraction?

  Taking numbers away from each other
• Steps for using column multiplication

  1️⃣ Stack the numbers

  2️⃣ Multiply each digit of the bottom number by each digit of the top number

  3️⃣ Add the products
• What is the result of adding 3 and 4 using number line addition?

  7
• Match the number of apples with their description:

  5 ↔️ Apples Initially

  2 ↔️ Removed Apples

  3 ↔️ Remaining Apples
• What is the result of multiplying 25 by 16 using the doubling and halving technique?

  400
• Steps in column addition

  1️⃣ Align numbers vertically by place value

  2️⃣ Add each column separately
• What does the equation 3 × 4 = 12 represent in terms of repeated addition?

  Adding 4 together 3 times
• What is the first step in column subtraction?

  Align the numbers vertically
• How does number line addition work?

  Start at first number and jump forward
• Order the division techniques from most structured to least structured.

  1️⃣ Column Division

  2️⃣ Number Line Division

  3️⃣ Estimating Division
• What is the purpose of estimating division in mathematics?

  Approximate the result
• Steps of the grid method in multiplication

  1️⃣ Split into boxes

  2️⃣ Draw in each box

  3️⃣ See the whole picture
• Estimating division provides an exact result.

  False
• Steps in column division

  1️⃣ Share toys one by one

  2️⃣ Ensure everyone gets the same amount
• Steps in column subtraction

  1️⃣ Align the numbers vertically

  2️⃣ Subtract each column from right to left

  3️⃣ Borrow from the next column if needed
• What analogy is used to describe doubling and halving in the study material?

  Sharing cookies
• What is the primary advantage of column division compared to standard long division?

  More structured approach
• Estimating division involves finding the exact quotient without any calculations.

  False
• What is column division used for?

  Sharing equally
• What analogy is used to describe multiplication in the study material?

  Building with blocks
• What is the approximate result of multiplying 18 by 23 using estimation?

  400
• Match the multiplication technique with its description:

  Column multiplication ↔️ Stacking blocks neatly

  Grid method ↔️ Drawing on a grid

  Doubling and halving ↔️ Sharing cookies

  Estimation ↔️ Guessing candies
• How does number line division work to solve division problems?

  Counts backward in groups
• How many friends can play if there are 20 toys and each friend needs 5?

  4
• Estimating addition provides an exact sum.

  False
• Number line division starts at zero and moves forward to the dividend.

  False
• Steps in number line subtraction

  1️⃣ Start at the first number

  2️⃣ Move backwards by the second number
• What is the result of 3 + 2 in addition?

  5