Tính a) 3/4 + 7/8 = ..... b) 4/5 - 3/7 = ..... c) 4/5 * 3/8 = ..... d) 12/10 - 3/5 : 2/3
Giải thích
a)34+78=68+78=138b)45−37=2835−1535=1335c)45×38=1240=310d)1210−35:23=1210−35×32=1210−910=310
a)34+78=68+78=138b)45−37=2835−1535=1335c)45×38=1240=310d)1210−35:23=1210−35×32=1210−910=310