Say What?
How much is 100 + 100 + 20?
220
562-572
-10
MENTAL MATH
155 + 245 = ?
400
How can you find the difference in a problem?
Adding or subtraction
Using subtraction
Mental Math
60 divided by ____ = 5
Mental Math
60 - 31 =
29
MENTAL MATH
98 + 99 =
197
What is the word "difference," refer to in math?
Subtraction
Mental Math
3x3x3
27
42-18
24
MENTAL MATH
30 + __ = 131
101
Use a number line to solve:
100 + 230 =
330
Mental Math
9 x 12 = ?
108
Mental Math
Shane's mom said to take a break after lunch at 12:25 p.m. His break was over at 1:10 p.m. How long was his break?
45 minutes
143 + 134 =
277
Use place value to solve:
Ms. Nati got 376 fries in McDonald's, then she shared some with Emi. Now she has 48. How many did Emi eat?
328