Simplify $10\times2u$10×2u.
What term should go in the space to make the statement true?
$2c$2c$\times$×$\editable{}$$=$=$6c$6c
Simplify the expression $7\times u\times v\times9$7×u×v×9.
Simplify the expression $\frac{1}{7}u^4\times28v^5$17u4×28v5.
Generalise the properties of operations with fractional numbers and integers.