Mental Math
30 + 50
80
87+56
Use any strategy.
143
22-18
Use any strategy.
4
127+18
Use any strategy.
145
153-31
Use any strategy.
122
7 tens + 3 tens
45+25
Use an HTO chart
70
80-12=
Use an HTO chart
68
136+16
Use any strategy.
152
200-37
Use any strategy.
163
65+40
105
27+46
Use totals below
73
77-29
Use vertical way
48
109+41
Use totals below
150
182-59
Use vertical way.
123
95+32
127
75 + 55 = ______ + 10
75 + 55 = 120 + 10
____ - 15 = 35
50 - 15 = 35
29+148
Use vertical way
177
154-37
Use totals below.
117
127+___=167
40
Mark collected 27 fewer coins than Craig. Mark collected 58 coins.
a. How many coins did Craig collect?
b. Mark collected 18 more coins than Shawn. How many coins did Shawn collect?
Use RDW.
a. Craig collected 85 coins.
b. Shawn collected 40 coins.
7 tens + 2 ones = 80 - _____
7 tens + 2 ones = 80 - 8
Ms. Lysowski bought dog toys, new dog beds, and dog food. She spent $12 on new dog toys, $101 on two dog beds, and $39 on dog food. How much did she spend in total?
Ms. Lysowski spent $152 on her dogs.
Ms. Lysowski buys 172 squishes and puts them in the blue box at the beginning of the week. 2B students earn 29 Paw Prints by the end of the week and each student chooses a squishy. How many squishies are now left in the blue box?
Use RDW.
There are 143 squishies left in the blue box.