PRACTICE BASIC OPERATIONS

EXER.1: CLICK HERE     EXER.2: CLICK HERE     EXER.3: CLICK HERE

EXER.4: CLICK HERE     EXER.5: CLICK HERE     EXER.6: CLICK HERE

EXER.7: CLICK HERE     EXER.8: CLICK HERE     EXER.9: CLICK HERE

EXER.10: CLICK HERE     EXER.11: CLICK HERE     EXER.12: CLICK HERE

EXER.13: CLICK HERE     EXER.14: CLICK HERE     EXER.15: CLICK HERE

EXER.16: CLICK HERE     EXER.17: CLICK HERE     EXER.18: CLICK HERE