Question

Tính bằng cách thuận tiện nhất

9/4 × 13/10 - 3/4 × 11/10 + 3/4 : 10/72

Answer 1

\(\frac{9}{4}x\frac{13}{10}-\frac{3}{4}x\frac{11}{10}+\frac{3}{4}:\frac{10}{72}\)

\(=\frac{39}{4}x\frac{3}{10}-\frac{11}{4}x\frac{3}{10}+\frac{72}{4}x\frac{3}{10}\)

\(=\frac{3}{10}x\left(\frac{39}{4}-\frac{11}{4}+\frac{72}{4}\right)\)

\(=\frac{3}{10}x25\)

\(=\frac{15}{2}\)

Answer 2

= 3x3/4x13/10-3/4x11/10+3/4x72/10

= 3/4x(3x13/10-11/10+72/10)

= 3/4x10

=30/4

=15/2

mih nha

Answer 3

bạn tách 9/4 × 13/10 làm sao