Addition
True or false: 11 + 20 = 35
False
True or false: When we go to regroup, we place the extra digit above the next digit to the left.
True
True or false: Five or more, don't raise the score
False
True or false: 4 or less, let it rest
True
What is a sum?
The answer to an addition problem
Solve: 24 + 35 =
59
Solve: 29 + 37 =
66
Round to the nearest ten: 27
30
Round to the nearest hundred: 113
100
What does estimate mean?
To make a predicted guess or approximation based off known information.
Solve: 55 + 74
129
Solve: 98 + 77 =
175
Round to the nearest ten: 33
30
Round to the nearest hundred: 303
300
Estimate the sum: 23 + 34 =
50
Solve: 197 + 102 =
299
Solve: 169 + 112 =
281
Round to the nearest ten: 20
20
Round to the nearest hundred: 555
600
Estimate the sum and add to the nearest ten.
98 + 122 =
220
Solve: 273 + 326
599
Solve: 294 + 205 =
499
Round to the nearest ten: 99
100
Round to the nearest hundred: 999
Estimate the sum and add to the nearest hundred.
155 + 211 =
400