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Double Digit Sprint

A foundational practice set on multi-digit computation focusing on standard algorithm fluency, partial product alignment, and regrouping accuracy for two-digit by two-digit multiplication.

SWStephanie Wooten

Double Digit Sprint

A foundational practice set on multi-digit computation focusing on standard algorithm fluency, partial product alignment, and regrouping accuracy for two-digit by two-digit multiplication.

SWStephanie Wooten

18 64 × 59

64

× 59

576

+3200

3,776

19 57 × 48

57

× 48

456

+2280

2,736

20 85 × 34

85

× 34

340

+2550

2,890

21 72 × 63

72

× 63

216

+4320

4,536

22 49 × 82

49

× 82

98

+3920

4,018

23 93 × 56

93

× 56

558

+4650

5,208

24 67 × 78

67

× 78

536

+4690

5,226

25 89 × 64

89

× 64

356

+5340

5,696

Problem #25 Estimation Key:

• Round \(89 \to 90\) and \(64 \to 60\)
• Estimated: \(90 \times 60 = 5,400\)
• Reasonableness: 5,696 is close to 5,400 (Answer: Yes)

Scoring Scale (out of 25):

• 23–25: Advanced / Mastered • 20–22: Proficient • 17–19: Developing • Below 17: Needs Intervention

Double Digit Sprint Answer Key • Complete Solutions Page 1 of 1

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