Rounding
Finish the phrase:
If the number next to the rounding digit is less than four then that number _____ ____ ______.
Remains the same.
Break up 912 into hundreds
900
Break up 374 into hundreds, tens and ones.
300+70+4
What does elapsed time mean?
Elapsed time means how much time has passed.
Finish the phrase:
If the number next to the rounding digit is five or more then ____ __.
Round up.
Break up 875 into tens
70
Break up 794 into hundreds, tens and ones.
700+90+4
True or false: 45 minutes is an example of elapsed time.
true
752
800
365+422=
300+400=700
60+20=80
5+2=7
=787
794-355
794-355
794-300=494
494-50=444
444-5=439
Ivan’s mother works out at the gym every day. She starts at 9: 15 a.m. and works out for 50 minutes. At what time is she expected to complete her workout?
10:05 am
Round to the nearest ten.
752
750
356+123=
300+100=400
50+20=70
6+3=9
479
What's the first step in 738-523?
First subtract 500 from 738.
Richard starts to do his school homework at 3: 30 p.m. He spends 45 minutes doing his math homework and 25 minutes doing his science homework. How much time has he spent to finish both the homework?
70 minutes
Round to the nearest ten and take the sum.
566+433=
570+430=1,000
550+223
500+200=700
50+20=70
0+3=3
=773
What's the second step in 738-523?
Then subtract 20 from 238.
Emily and her friends went to spend some time relaxing by the lake on a Saturday evening. They reached there at 3 : 30 p.m. and spent 2 hours and 30 minutes at the lake and left home. At what time did they leave home?
6 pm