儿童上学用太阳能电池计算器－Used Casio Solar Dual Powered Scientific Calculator (FX-991MS) $12

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儿童上学用Casio太阳能电池计算器（不需要换电池）

Casio Solar Dual Powered Scientific Calculator (FX-991MS) $12
• 2-line display
• Fraction calculations
• Integration calculations
• Combination and Permutation
• Statistics
(STAT-data editor, Standard deviation, Normal distribution calculations, Regression analysis)
• Base-n calculations / conversions
• Logical operations
• Complex number calculations
• CALC memory
• Engineering symbol calculations
• 40 scientific calculations
• 40 metric conversions(20 conversion pairs)
• 9 variable memories
• Comes with slide-on hard case