Class 4MathematicsBuilding with Bricks
Multiplying 2-Digit by 1-Digit
Method: Multiply ones first, then tens. Example: 34 × 7. Ones: 4×7=28, write 8 carry 2. Tens: 3×7=21, +2(carry)=23. Answer: 238. Or: expand 34 = 30+4. Then: 30×7=210 and 4×7=28. Add: 210+28=238. This expanded form helps understand why the method works. Always check by rough estimate: 34×7 ≈ 35×7 = 245. Close to 238 ✓
10 examples
Concept check 1
For Class 4 Mathematics, explain or solve a multiplying 2-digit by 1-digit question from the chapter "Building with Bricks". Focus on concept check and show the working clearly.
Definition to application 2
For Class 4 Mathematics, explain or solve a multiplying 2-digit by 1-digit question from the chapter "Building with Bricks". Focus on definition to application and show the working clearly.
Formula warm-up 3
For Class 4 Mathematics, explain or solve a multiplying 2-digit by 1-digit question from the chapter "Building with Bricks". Focus on formula warm-up and show the working clearly.
Reasoning practice 4
For Class 4 Mathematics, explain or solve a multiplying 2-digit by 1-digit question from the chapter "Building with Bricks". Focus on reasoning practice and show the working clearly.
Board-style short answer 5
For Class 4 Mathematics, explain or solve a multiplying 2-digit by 1-digit question from the chapter "Building with Bricks". Focus on board-style short answer and show the working clearly.
Mistake correction 6
For Class 4 Mathematics, explain or solve a multiplying 2-digit by 1-digit question from the chapter "Building with Bricks". Focus on mistake correction and show the working clearly.
Visual interpretation 7
For Class 4 Mathematics, explain or solve a multiplying 2-digit by 1-digit question from the chapter "Building with Bricks". Focus on visual interpretation and show the working clearly.
Applied word problem 8
For Class 4 Mathematics, explain or solve a multiplying 2-digit by 1-digit question from the chapter "Building with Bricks". Focus on applied word problem and show the working clearly.
Revision challenge 9
For Class 4 Mathematics, explain or solve a multiplying 2-digit by 1-digit question from the chapter "Building with Bricks". Focus on revision challenge and show the working clearly.
Exam recap 10
For Class 4 Mathematics, explain or solve a multiplying 2-digit by 1-digit question from the chapter "Building with Bricks". Focus on exam recap and show the working clearly.