Q36: Evaluate <span class="ql-formula" data-value="-x"><span class="katex"><span
Q37: Solve the problem.<br>-After one round in a
Q38: Simplify.<br>- <span class="ql-formula" data-value="\frac{7}{23}-\frac{13}{46}+\frac{4}{23}-\frac{5}{46}"><span class="katex"><span class="katex-mathml"><math
Q39: List the terms of the expression.<br>-
Q40: Add. Do not use a number
Q42: Simplify.<br>- <span class="ql-formula" data-value="\frac{8-5^{2}}{6^{2}+7^{2}}"><span class="katex"><span class="katex-mathml"><math
Q43: Add. Do not use a number
Q44: Divide.<br>- <span class="ql-formula" data-value="-\frac{3}{2} \div\left(-\frac{2}{3}\right)"><span class="katex"><span
Q45: Divide.<br>- <span class="ql-formula" data-value="\frac{-3.2}{0.8}"><span class="katex"><span class="katex-mathml"><math
Q46: Simplify.<br>- <span class="ql-formula" data-value="\frac{15 a b}{21