Mental Math
Rounding Numbers to the Nearest Hundred and Thousand
Instructions
• First you need a piece of paper and a pencil.• Please write your name, date and class at the
top.• Mental math isn’t about your hand its about
your head.• Its fine if you find a few of them difficult! If
you can’t get an exact answer make an estimate.
A little laugh before we start…
Specific Instructions
• You will see TWO lists of 10 numbers.• In the FIRST LIST round each number
to the nearest hundred.• In the SECOND LIST round each
number to the nearest thousand.• You will have 2 minutes.
Sept.8, 2011 – sheet #1
1) 6832) 5643) 9124) 5005) 1016) 8677) 5498) 0989) 42510) 449
Sept.8, 2011 – sheet #2
1) 12032) 78163) 48994) 26735) 24106) 85517) 35498) 37779) 503710) 1999
Sept.8, 2011 – sheet #1 ANSWERS
1) 683=7002) 564=6003) 912=9004) 500=5005) 101=1006) 867=9007) 549=5008) 098=1009) 425=40010) 449=400
Sept.8, 2011 – sheet #2 ANSWERS
1) 1203=10002) 7816=80003) 4899=50004) 2673=30005) 2410=20006) 8551=90007) 3549=40008) 3777=40009) 5037=500010) 1999=2000
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