Mental Arithmetic
Level
1
2
3
4/10
About
how much is this?
$33 + $7 + $19
≈
$
90
\approx \$90
≈
$90
≈
$
70
\approx \$70
≈
$70
≈
$
60
\approx \$60
≈
$60
≈
$
80
\approx \$80
≈
$80
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