355+260+140+245 102×99 645-180-245
382×101-382 3500÷14÷5 175×56+25×56
75×43+75×57=75× 62×18-8×62=×
149-36-64=- 300÷25÷4=300÷
368+234+156-(168-66-44)
89+53+47 436+37+64+163