1 tính nhanh c) 53(51 + 4 ) 53 ( 49 + 96) + 53 d) 3+6+9+12+....+123+126

a) 274+(158+26) b) 29+132+237+868+163 c) 98.31+62 d) 10+11+12+13+...+99 f) (1+3+5+7+... + 217) (135135.137 - 135.137137 e) 3.25.8+4.37.6+2.38.12

lf 2 numbers are odd , how should l find the remaining numbers?

Giúp vs ạ