Exercises: Multiplying Multi-Digit Whole Numbers with the Standard Algorithm
Work through each section in order. For every multiplication problem, estimate the
product before computing so you can check whether your answer is reasonable.
Warm-Up: Review What You Know
These problems review skills you have already learned.
Which expression matches the area-model breakdown of 24 × 13 into four place-value parts?
(20 × 10) + (20 × 3) + (4 × 10) + (4 × 3)
(24 × 10) + (24 × 3)
(20 + 4) × (10 + 3), left unexpanded
(2 × 1) + (2 × 3) + (4 × 1) + (4 × 3)
What is 7 × 8?
Using the distributive property, 6 × 14 = 6 × 10 + 6 × ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲
Fluency Practice
Use the standard algorithm to compute 23 × 13.
Use the standard algorithm to compute 47 × 36.
Use the standard algorithm to compute 58 × 43.
Use the standard algorithm to compute 258 × 43.
Use the standard algorithm to compute 245 × 163.
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