в)405:27+135:27=(405+135)/27=540/27=20
г)2926:19+874:19=(2926+874)/19=3800/19=200
в)=(405+135):27=540:27=20
г)=(2926+874):19=3800:19=200
в)405:27+135:27=(405+135)/27=540/27=20
г)2926:19+874:19=(2926+874)/19=3800/19=200
в)=(405+135):27=540:27=20
г)=(2926+874):19=3800:19=200