Toán Tính nhanh: a) 2.29.3+6.51+20.6 b) 41.44+2.25.22+34.11.4 c) 2.13.6+4.416.3+571.12 d) 9.27.4+12.35.3+18.38.2 22/07/2021 By Iris Tính nhanh: a) 2.29.3+6.51+20.6 b) 41.44+2.25.22+34.11.4 c) 2.13.6+4.416.3+571.12 d) 9.27.4+12.35.3+18.38.2
a)2.29.3+6.51+20.6 =6.(29+51+20) =6.100 =600 b)41.44+2.25.22+34.11.4 =44.(41+25+34) =44.100 =4400 c)2.13.6+4.416.3+571.12 =12.(13+416+571) =12.1000 =12000 d)9.27.4+12.35.3+18.38.2 =36.(27+35+38) =36.100 =3600 Trả lời