Solve the following addition problems:

99 + 104 = _____	306 + 291 = _____
78 + 57 = _____	204 + 278 = _____
98 + 128 = _____	409 + 246 = _____
187 + 233 = _____	15 + 74 = _____
284 + 440 = _____	181 + 369 = _____