Back to Exercise: Fluently multiply multi-digit whole numbers using the standard algorithm

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.

Grade 5·20 problems·~30 min·Common Core Math - Grade 5·standard·5-nbt-b-5

Work through problems with immediate feedback

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 × ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲

second factor:

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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