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Soromania, learn japanese abacus SOROBAN
multiplication and division - edition 2
train your brain
mul 2: 3d/1n
mul 3: 3d/1n
mul 5: 3d/1n
mul 9: 3d/1n
mul: 3d/1n
mul 2: 5d/1n
mul 3: 5d/1n
mul 5: 5d/1n
mul 9: 5d/1n
mul: 5d/1n
mul 2: 8d/1n
mul 3: 8d/1n
mul 5: 8d/1n
mul 9: 8d/1n
mul: 8d/1n
mul: 4d/1n (25s)
mul: 4d/1n (23s)
mul: 4d/1n (21s)
mul: 4d/1n (18s)
mul: 4d/1n (15s)
mul: 6d/1n (25s)
mul: 6d/1n (23s)
mul: 6d/1n (21s)
mul: 6d/1n (18s)
mul: 6d/1n (15s)
mul 2: 3d/2n
mul 3: 3d/2n
mul 5: 3d/2n
mul 9: 3d/2n
mul: 3d/2n
mul 2: 5d/2n
mul 3: 5d/2n
mul 5: 5d/2n
mul 9: 5d/2n
mul: 5d/2n
mul 2: 8d/2n
mul 3: 8d/2n
mul 5: 8d/2n
mul 9: 8d/2n
mul: 8d/2n
mul: 4d/2n (30s)
mul: 4d/2n (28s)
mul: 4d/2n (26s)
mul: 4d/2n (23s)
mul: 4d/2n (20s)
mul: 6d/2n (30s)
mul: 6d/2n (28s)
mul: 6d/2n (26s)
mul: 6d/2n (23s)
mul: 6d/2n (20s)
mul 2: 3d/3n
mul 3: 3d/3n
mul 5: 3d/3n
mul 9: 3d/3n
mul: 3d/3n
mul 2: 5d/3n
mul 3: 5d/3n
mul 5: 5d/3n
mul 9: 5d/3n
mul: 5d/3n
mul 2: 8d/3n
mul 3: 8d/3n
mul 5: 8d/3n
mul 9: 8d/3n
mul: 8d/3n
mul: 4d/3n (40s)
mul: 4d/3n (38s)
mul: 4d/3n (36s)
mul: 4d/3n (33s)
mul: 4d/3n (30s)
mul: 6d/3n (40s)
mul: 6d/3n (38s)
mul: 6d/3n (36s)
mul: 6d/3n (33s)
mul: 6d/3n (30s)
div: 3d/1n
div: 3d/1n (100s)
div: 3d/1n (90s)
div: 3d/1n (80s)
div: 3d/1n (60s)
div: 3d/2n
div: 3d/2n (100s)
div: 3d/2n (90s)
div: 3d/2n (80s)
div: 3d/2n (60s)
div: 4d/2n
div: 4d/2n (100s)
div: 4d/2n (90s)
div: 4d/2n (80s)
div: 4d/2n (60s)
div: 4d/3n
div: 4d/3n (100s)
div: 4d/3n (90s)
div: 4d/3n (80s)
div: 4d/3n (60s)
div: 5d/2n
div: 5d/2n (100s)
div: 5d/2n (90s)
div: 5d/2n (80s)
div: 5d/2n (60s)
