1.
$7 \frac{2}{7}$ of $189+452=2000-?$
2.
68% of 595 – 43% of 372 = ?
4.
$(45)^{2}+(21)^{2}=(?)^{2}+257$
5.
$90780 \div \sqrt{?}=85 \times 12$
6.
$\frac{15 \times 11+45}{13 \times 9-30}=?$
7.
$39852 \div \sqrt{?}=81 \times 12$
8.
54679 + 34521 = ? + 43668
10.
3.3 + 13.33 + 31.13 + 13.31 + 1.3 = ?
11.
$(16)^{2}+(21)^{2}-(13)^{2}+?=(25)^{2}$
12.
73% of 5800 – 69% of 240 = ?
13.
$\left(\frac{17}{119} \times \frac{98}{14}\right)^{2}=?$
15.
72% of 654 – 41% of 312 = ?
