Find the equations −8.58÷□=3.9−3.2×□=24

Question

Find the equations

$- 8.58 \div ◻ = 3.9$
$- 3.2 \times ◻ = 24$

Answer 1

c) A division fact of $a \div b = c$ is equivalent to the division fact $a \div c = b$ .

Therefore $- 8.58 \div ◻ = 3.9$ is equivalent to the division fact $- 8.58 \div 3.9 = □ ◻$ .

Since $- 8.58 \div 3.9 = - 2.2$ , then $- 8.58 \div - 2.2 = 3.9 .$
d) A multiplication fact of $a \times b = c a \times b = c$ is equivalent to the division fact $b = c \div a$ .

Therefore $- 3.2 \times ◻ = 24$ is equivalent to the division fact $◻ = 24 \div (- 3.2) ◻$ .

Since $24 \div (- 3.2) = - 7.524 \div (- 3.2) = - 7.5$ , then $- 3.2 \times - 7.5 = 24.$

Find the equations −8.58÷□=3.9−3.2×□=24

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