bài 1
a. 15.17-15.16=15.(17-16)=15.1=15
b.73.22+22.27=22.(73+27)=22.100=4.100=400
c.14:\(\left\{300:\left[500-\left(105+35.7\right)\right]\right\}\)
=14:\(\left\{300:\left[500-\left(105+245\right)\right]\right\}\)
=14:\(\left\{300:\left[500-350\right]\right\}\)=14:\(\left\{300:150\right\}\)=14:2=7
d.14.51+14.6-47.14=14.(51+6-47)=14.10=140
e.3.52-16:22=3.25-16:4=75-4=71
f.306:\(\left[119-\left(23-6\right)\right]\)=306:\(\left[119-17\right]\)=306:102=3