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▶Child Arithmetic Study
▶Grade 1 (小学1年生)
▶Subtraction (引き算)
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Addition (足し算)
Subtraction (引き算)
Large Numbers (大きな数)
Long Division (割り算の筆算)
Decimals (小数)
Fractions (分数)
Angles (角の大きさ)
Area (面積)