1.5×[19/21÷61/3×(0.7-0.66)]×4.9.
问题描述:
1.5×[
÷619 21
×(0.7-0.66)]×4.9. 1 3
答
1.5×[
÷619 21
×(0.7-0.66)]×4.9,1 3
=1.5×[
÷19 21
÷0.04×4.9,19 3
=1.5×[
×19 21
×25]×4.9,3 19
=1.5×
×4.9,25 7
=26.25.