①307+928÷29
②127+348+473
③962-501
④678-239-261
⑤48×(87+223)
⑥156-37+44
900÷25
1500÷125
800÷4÷25
①
②36×()
③
④
⑤3.24×0.76+3.24×0.24
⑥