Nguyễn Huy Hoàng
23/08/2017 at 08:42-
Help you solve math 23/08/2017 at 08:45a, 100 . 10 + 200 . 10
=10 . (100 + 200)
=10 . 300
=3000
b, 10 . 20 + 20 . 40
=20 . (10+40)
=20 . 50
=1000
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Lê Văn Thành 25/08/2017 at 12:35100 . 10 + 200 . 10
=10 . (100 + 200)
=10 . 300
=3000
10 . 20 + 20 . 40
=20 . (10+40)
=20 . 50
=1000