1: Soal Sempoa Advance

25.6 + 3.74 – 12.89 = ? Here, aligning decimal points on the abacus (usually fixing the unit rod) is critical. Below is a representative set of 10 questions (abridged from typical full 60-question paper).

| No. | Question | |-----|-------------------------------------------| | 1 | 6,328 + 4,795 – 3,081 = ? | | 2 | 9,045 – 2,378 + 1,264 – 4,992 = ? | | 3 | 58 × 36 = ? | | 4 | 429 × 17 = ? | | 5 | 3,744 ÷ 18 = ? | | 6 | 12.45 + 6.8 – 3.27 = ? | | 7 | (75 + 128) × 4 = ? | | 8 | 5,832 ÷ 27 = ? | | 9 | 8,075 – (2,360 + 1,415) = ? | | 10 | 2.5 × 3.2 = ? (as decimal on abacus) | soal sempoa advance 1

7,488 ÷ 24 = ? The student uses the standard abacus division algorithm: estimate quotient digit, multiply, subtract, shift, repeat. Example: | | 3 | 58 × 36 =

Example:

Example:

347 × 28 = ? Students must place products correctly on rods (e.g., 347 × 20 = 6,940; then 347 × 8 = 2,776; sum = 9,716). This requires understanding of left-to-right multiplication on the abacus. Division problems are no longer "short division" with 1-digit divisors. Advance 1 introduces 2-digit divisors . 347 × 20 = 6

Introduction: The Bridge Between Basic and Expert In the world of abacus-based mental arithmetic training, few milestones are as significant as the transition from foundation levels to Advance 1 . The term "Soal Sempoa Advance 1" (often found in Indonesian abacus curricula, though used globally) refers to a structured set of problems designed for students who have mastered basic addition, subtraction, simple multiplication, and division on the soroban or suanpan.