Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 0.3, 0.4)
- 80¢ + _____¢ = $1
- $0.55 + $_____ = $1
- 85¢ + $_____ = $1
- $0.65 + $_____ = $1
(a)
$1 = 100¢
80¢ + _____¢ = $1
80¢ + _____¢ = 100¢
100¢ - 80¢ = 20¢
(b)
$0.55 + $_____ = $1
$1 - $0.55 = $0.45
(c)
$1 = 100¢
85¢ + $_____ = $1
$0.85 + $_____ = $1
$1 - $0.85 = $0.15
(d)
$0.65 + $_____ = $1
$1 - $0.65 = $0.35
Answer(s): 20, 0.45, 0.15, 0.35