Mental Arithmetic
Level
1
2
3
8/10
About
how much to pay?
≈
$
63
\approx \$63
≈
$63
≈
$
67
\approx \$67
≈
$67
≈
$
65
\approx \$65
≈
$65
≈
$
61
\approx \$61
≈
$61
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