Mental Math
Blocks
subtraction
Addition
Place value
100
Is the equation true?
17 + 10 = 18
yes or no?
no
100
2 tens + 24 ones =
44
100
10-5 =
5
100
10 + 10 =
20
100
What is the place value of 5 in the number 25
ones place
200
Is the equation true?
32 + 10 = 42
yes or no?
yes
200
What is the sum?
____________+__________=
29
200
25 -0 =
25
200
25 + 3 =
28
200
What is the place value of 7 in the number 73
tens place
300
What is the sum?
10 + 51 =
61
300
What is the sum?
37
300
30 - 10 =
20
300
25 + 10 =
35
300
How many tens does the number 99 have?
9 tens
400
What is the sum?
86 + 10 =
96
400
20 tens + 5 ones =
25
400
44- 14 =
30
400
65 + 10 =
75
400
What does 9 tens equal to
90
500
What is the sum?
10 + 64 =
74
500
100 tens + 70 ones =
170
500
100- 100 =
0
500
100 + 100 =
200
500
what is the place value of 1 in the number 100
hundreds place