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Homework Answer Keys
Homework Answer Keys
Matching answer keys for all 20 homework sheets. Quick-grade format.
Teacher Classroom Bundle — Homework Answer Keys
Quick-grade format answer keys for all 20 homework sheets. Organised by course for efficient batch marking.
Abacus Level 1
HW 1: Bead Positions
1. 5
2. 3
3. Upper down + 1 lower up
4. Upper down + 4 lower up
5. False (upper bead = 5)
6. 0
7. All beads away from bar
8. 5, 6, 7, 8, 9
9. 9
10. Check drawings match positions
HW 2: Two-Rod Numbers
1. T:1 lower, O:all clear
2. T:1 lower, O:upper down
3. T:1 lower, O:upper+4 lower
4. 13
5. 20
6-7. Check drawings
8. Ones rod
9. False (2 lower beads)
10. Check all positions
HW 3: Addition
3, 5, 4, 5, 7, 9, 6, 7, 7, 7
11. Upper bead swap needed
12. 4+1, 3+3, 4+3
HW 4: Subtraction
3, 4, 3, 5, 1, 5, 0, 8, 5, 2
11. Push upper bead back up
12. 6-5, 8-6 (5-comp rule)
HW 5: Mixed
1-2. Check drawings
7, 3, 8, 3, 9, 2
9. Any 3 of: frame, rod, upper bead, lower bead, bar
10. 99
Abacus Level 2
Abacus Level 2
HW 1: 5-Comp
4, 2
6, 6, 8, 7, 6, 7
3, 3
11-12. See complement pairs
HW 2: 10-Comp
7, 2
11, 14, 12, 13, 13, 16
8, 7
11-12. See complement pairs
HW 3: Carry
22, 32, 22, 33, 42, 24, 51, 23, 43, 52
11. Show ones: 8+5=13, carry 1, tens: 2+1+1=4
12. 10-complement
HW 4: Borrow
16, 27, 7, 33, 19, 28, 37, 26, 15, 8
11. Tens: 4-1=3, Ones: borrow, +5 to ones, 11-5=6. Answer: 26
12. Forgetting to reduce tens after borrowing
HW 5: Mixed
7 (5-comp), 15 (10-comp), 3, 4, 42, 17
7. Wrong complement: 5-comp of 4=1, not 3. Answer=8
8-9. See pairs
10. 47
Abacus Level 3
Abacus Level 3
HW 1: Multi-Digit Add
59, 85, 83, 92, 93, 93, 101, 92, 93, 93
HW 2: Multi-Digit Sub
45, 46, 17, 36, 17, 27, 27, 66, 34, 19
HW 3: Mental Calc
13, 5, 23, 15, 9, 15, 10, 13, 52, 27
HW 4: Speed
13, 7, 33, 17, 71, 26, 92, 37, 93, 33
HW 5: Comprehensive
95, 48, 10, 15
5. Check drawing
91, 27
8. 5-comp, 10-comp pairs
86
Vedic Maths
Vedic Maths
HW 1: Digit Sums
9, 18(=9), 18(=9), Correct (DS: 3+6=9, DS(27)=9)
Correct
27(=9)
Correct
Correct
10(=1)
99 (DS=18=9; 99: DS=18=9; 96: DS=15=6. Answer is 99)
HW 2: Nikhilam
72, 63, 54, 56, 48, 42, 81, 64, 49
10. 8-3=5(cross), 2x3=6. Answer=56
12. 36
HW 3: Ekadhikena
225, 625, 1225, 2025, 3025, 4225, 5625, 7225, 9025
10. 4x5=20, suffix 25. Answer=2025
HW 4: Urdhva Tiryak
132, 143, 156, 168, 182, 165, 180, 195, 210
10. Vertical: 1x1=1, Cross: 1x4+3x1=7, Vertical: 3x4=12, carry→182
HW 5: Mixed
15(=6), 54, 625, 168, Correct (DS:7x5=35=8, DS(170)=8)
9506, 3025, 176
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