0.1 more or less changes the tenths digit; 0.01 changes the hundredths digit. If a digit goes past 9 or below 0, regroup: 1.69 + 0.01 = 1.70.
tenth0.1, one of 10 equal parts
hundredth0.01, one of 100 equal parts
decimal pointthe dot between wholes and parts
regrouptrade 10 of one place for 1 of the next
Watch for: Changing the wrong digit: 0.1 more than 3.45 is 3.55, not 3.46. Not regrouping: 0.01 more than 1.69 is 1.70, not 1.610. Adding when the question says less, or when working backwards.
At home: Use coins: start from an amount like $1.69, add a dime (0.10) or a penny (0.01), and say the new total.
Sample sheet and answer key
Luna's Space Adventure
Grade 4 · 0.1 and 0.01 more or less · MA.4.NSO.2.6
NameDate
Astronaut Luna is exploring a far-off corner of space. Solve each problem to help Luna's mission go smoothly!
A little more, a little less
0.1 changes the tenths digit; 0.01 changes the hundredths digit.
0.01 more than 8.4 =
0.1 more than 16.14 =
0.01 more than 12.4 =
0.01 less than 0.5 =
0.1 more than 10.99 =
0.1 less than 11.93 =
0.1 more than 17.53 =
0.01 less than 15.6 =
Fill the table
Start from the number in the middle each time.
0.1 less
0.01 less
Number
0.01 more
0.1 more
11.7
20.3
7.6
17.31
On the number line
Each step is 0.1. Fill the boxes, then finish the equation.
1.6 − 0.1 =
Work backwards
What number did it start from?
83.80 is 0.01 more than
16.20 is 0.01 more than
15.00 is 0.01 more than
7.05 is 0.1 more than
Sheet
Luna's Space Adventure
Grade 4 · 0.1 and 0.01 more or less · MA.4.NSO.2.6
Answer key
Astronaut Luna is exploring a far-off corner of space. Solve each problem to help Luna's mission go smoothly!
A little more, a little less
0.1 changes the tenths digit; 0.01 changes the hundredths digit.
0.01 more than 8.4 =8.41
0.1 more than 16.14 =16.24
0.01 more than 12.4 =12.41
0.01 less than 0.5 =0.49
0.1 more than 10.99 =11.09
0.1 less than 11.93 =11.83
0.1 more than 17.53 =17.63
0.01 less than 15.6 =15.59
Fill the table
Start from the number in the middle each time.
0.1 less
0.01 less
Number
0.01 more
0.1 more
11.6
11.69
11.7
11.71
11.8
20.2
20.29
20.3
20.31
20.4
7.5
7.59
7.6
7.61
7.7
17.21
17.30
17.31
17.32
17.41
On the number line
Each step is 0.1. Fill the boxes, then finish the equation.
1.6 − 0.1 =1.5
Work backwards
What number did it start from?
83.80 is 0.01 more than83.79
16.20 is 0.01 more than16.19
15.00 is 0.01 more than14.99
7.05 is 0.1 more than6.95
Answer key
New problems every time, three levels (gentle, core and stretch), themes to pick from, a second page if you want one. Each sheet comes with an answer key and a one-page guide for grown-ups.
