Trả lời: Câu 1.31:a. 2x + $\frac{1}{2}$ = $\frac{7}{9}$=>2x = $\frac{7}{9}$ - $\frac{1}{2}$ = > 2x = $\frac{14}{18}$ - $\frac{9}{18}$=> 2x = $\frac{5}{18}$=> x= $\frac{5}{18}$ . $\frac{1}{2}$=> x= $\frac{5}{36}$b. $\frac{3}{4}$ - 6x = $\frac{7}{13}$=>$\frac{3}{4}$ - $\frac{7}{13}$ = 6x=...
Trả lời: Câu 1.32 :Sắp xếp : Nicaragua , Vostock, Ontario, Erie, Baikal, Michigan, Victoria, Superio, Caspian
Trả lời: Câu 1.33:a. A= 32,125- ( 6,325 + 12,125 ) - ( 37 + 13,675 ) = 32,125- 6,325 - 12,125 - 37 - 13,675= (32,125-12,125) - (6,325 +13,675) - 37 = 20 - 20 - 37 = -37b. B= 4,75 + $\left ( \frac{-1}{2} \right )^{3}$ + $0,5^{2}$ - 3.$\frac{-3}{8}$ = 4,75 + $\frac{-1}{8}$ + $0,5^{2}$ + $\frac{9}{...
Trả lời: Câu 1.34 : 2,2- ( 3,3 + 4,4-5,5 ) = 0