Expanded Form & Mental Math
Without finding the sums... is 17+93 greater than 100
YES because I added the tens column, and 1+9=10 so it is greater than 10.
What is 10+10+10+10?
Kash saw 16 birds in the tree. He also saw 7 birds in the nest. How many birds did Kash see?
Draw quick pictures to solve and write the sum.
23
Without finding the sums... is 36+37 greater than 100
No because I added the tens column, and 3+3=6 is not greater than 10.
What is 21+49+5?
75
37 + 42=? Use the break apart strategy to solve (expanded form)
30 + 7
40 + 2
70 + 9= 79
What is 23+41+12?
76
Without finding the sums... is 76+13 greater than 100
No because I added the tens column, and 7+1=8 is not greater than 10.
What is 59+10+19+23?
Show your work!
111
Malik has 28 marbles, Isabella has 16, Enso has 23, and Za'Nae has 14. Write the number sentence and solve
28+16+23+14=?
81
67 + 46=? Use the break apart strategy to solve (expanded form)
60 + 7
40 + 6
100 + 13= 113
What is 90+99+20+11?
220
Olivia says she can find the sum of 40 + 36 without rewriting it. Explain how you can solve this problem using mental math. Solve
76. I added the tens first because the zero in the ones column does NOTHING.