UCMAS (abacus and mental calculations)

Abacus calculation

4+98+71+2+35+9+60+1=

• 300

• 270

• 279

• 200

Abacus calculations:

70+1-59+8-3+46-2+81=

• 142

• 200

• 100

• 150

Abacus calculations:

47+8+39+6+50+1+4+27=

• 200

• 250

• 182

• 109

Abacus calculations:

8+34-1+74-90+5+62-2=

• 207

• 80

• 105

• 95

Abacus calculations:

2+4+85+3+90+8+73+6=

• 230

• 281

• 103

• 175

Mental calculations:

287+406+560+931=

• 3312

• 2184

• 2211

Mental calculations:

469+705+193+528=

• 1907

• 1890

• 1895

Mental calculations:

629+348+907-615=

• 1269

• 1290

• 1296

Mental calculations:

444+555+222-111

• 1109

• 1110

• 1116

Mental calculations:

444+777+222-764

• 769

• 976

• 679