Question

Tinh bang cach thuan tien nhat:

a)21/11x22/17x68/63

b)5/14x7/13x26/25

Answer 1

a,= 21x 22x 68/11x 17x 63=21x 11x 2x 17x 4/11x 17x 21x 3=8/3

b,= 5x 7x 26/14x13x25= 5x 7x 13x 2/7x 2x 13x 5x 5

Answer 2

tinh bang cach thuan tien nhat : 2.017 * 35.6 + 63.4 * 2.017 + 2.017 

                            giup mik nha mik sap thi cuoi nam hoc roi