Question

Bài 10 (M4) (1 điểm): Tính bằng cách thuận tiện

               7,15 : 0,5 + 7,15 x 9 – 7,15

Answer 1

\(7,15:0,5+7,15\times9-7,15\\ =7,15\times2+7,15\times9-7,15\\ =7,15\times\left(2+9-1\right)\\ =7,15\times10\\ =71,5\)

Answer 2

\(#Chill with me\)

=\(7 , 15 × 2 + 7 , 15 × 9 − 7 , 51 × 1\)

\(= 7 , 15 × ( 2 + 9 − 1 )\)

\(= 7 , 15 × 10=71,5\)

Answer 3

\(\text{= 7 , 15 × 2 + 7 , 15 × 9 − 7 , 15 }\)

\(\text{= 7 , 15 × ( 2 + 9 − 1 ) = 7 , 15 × 10 = 71 , 5}\)