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