Addition Review
85 + 97 =
182
78 - 65 =
13
When do you need to regroup when you are subtracting?
When the second number in the problem has a larger value in the ones place than the first number
5 x 4 =
20
count the change:
5 dimes, 5 nickels, 3 pennies
$0.78
741 + 89 =
830
87 - 34 =
53
What is wrong with this problem?
45 - 89 =
The number with the smaller value is first.
8 x 4 =
32
Count the change:
1 quarter, 11 pennies
$0.36
1,243 + 766 =
2,009
89 - 45 =
44
True or False.
Order does not matter when you are subtracting.
FALSE!
7 x 6 =
42
Count the change:
2 quarters, 1 nickel, 7 pennies
$0.62
1,743 + 5,681 =
7,424
57 - 39 =
18
54 - 28 =
26
9 x 3 =
27
Count the change:
4 dimes, 2 nickels, 1 quarter
$0.75
120,874 + 45,698 =
166,572
74 - 25 =
49
70 - 64 =
6
12 x 4 =
48
Oscar has a dime, a nickel, and a penny. Isaac has 2 quarters, a nickel, and 3 pennies. How much more money does Isaac have than Oscar?
$0.42