Mental Math
55 + 10 = __
65
37 + 26 = __
63
71 - 14 = __
57
Amy spent $17 more on a dress than shoes.
What goes in the blanks for arrow way?
+10 +__
85 --> ___ --> 99
95, 4
115 + 10 = __
125
__ = 17 + 124
141
__ = 82 - 68
14
Amy went shopping. She spent $39 on shoes and $56 on a dress. After Amy's shopping trip she had $5 left. How much money did she have to begin with? RDW to solve!
Amy had $100 to begin with.
Amy solved 215 + 12 as shown. Explain why she is correct.
+10 +2
215 --> 225 --> 227
Amy's work is correct because she adds 1 ten and 2 ones using arrow way. 1 ten and 2 ones is 12.
__ = 164 - 100
64
56 + 35 = __
91
80 - __ = 25 + 5 + 12
38
Amy went shopping. She had $100. She spent $39 on shoes and $56 on a dress. If Amy hadn't purchased the shoes, would she have been able to afford a $45 purse? Explain your answer - RDW to solve!
No, she would not be able to buy the purse because she would have $44.
Rumi had to solve 125 - 38. She correctly solved and got an answer of 87. Explain why her strategy works.
-20 -5 -10 -3
125 --> 105 --> 100 --> 90 --> 87
Rumi's strategy works because she is subtracting 3 tens and 8 ones altogether using arrow way.
55 + 40 = __
95
18 + 48 + 51 + 12 = __
129
__ = 115 - 32
83
Amy went shopping. She spent $39 on shoes and $56 on a dress. The purse she wants is $45. How much money would Amy need to buy the shoes, dress, and purse? RDW to solve!
Amy would need $140 to buy the shoes, dress, and purse.
I have 28 apples. Bri gives me 4 more apples. I give 2 apples away. How many apples am I left with?
I am left with 30 apples.
__ = 169 - 27
142
35 + 45 = __ + 40
40
4 tens + 2 ones = 60 - __
18
Ms. Sujka has $113. She spends $85 on Pokemon cards. How much money does she have left? RDW to solve!
Ms. Sujka has $28 left.
If I start at 176, how much more do I need to get to 214?
I need 38 more.