270×2÷9
=540÷9
=60
305÷5×4
=61×4
=244
400÷(2×4)
=400÷8
=50
560÷7×6
=80×6
=480
19×4+15
=76+15
=91
270×2÷9
=540÷9
=60
305÷5×4
=61×4
=244
400÷(2×4)
=400÷8
=50
560÷7×6
=80×6
=480
19×4+15
=76+15
=91
Copyright © 2018 - 2021 www.yd166.com., All Rights Reserved.