Mental Math
Mental Math
24 + 15 = ?
39
200 - 10 = ?
190
37 + 68 = ?
105
3 x 12 = ?
36
What does DMSBR stand for?
Division Checklist:
Divide, Multiply, Subtract, Bring Down, Repeat
What does the G in GEMDAS stand for?
GROUPING: () PARENTHESES [] BRACKETS
basically, it's repeated addition
multiplication
Mental Math
9 x 6 = ?
54
562 - 191 = ?
371
155 + 245 = ?
400
700 x 8 = ?
5,600
42 divided into 6 groups?
7 in each group
Solve.
24 + 8 x 10 ÷ 4
44
a zero that shows there is no digit in that place value
What is a placeholder?
Mental Math
60 ÷ 3 = ?
20
97-67 = ?
30
98 + 499 = ?
597
8 x 9 x 2 =
144
$90 shared among 5 people?
$18 per person
Solve.
3 (7 – 3) + 5 x 4
32
product
Mental Math
40 x 900 = ?
36,000
5649 - 3495 = ?
2154
30 + x = 951
x = 921
76 x 15 = ?
1,140
2451 ÷ 57 = ?
43
Write the numerical expression for the following statement.
Multiply 8 by 9 then divide the answer by the product of 3 and 24.
(8 x 9) ÷ (3x24)
The answer to a division problem.
quotient
Mental Math
Solve: (6 x ____ ) = 72
12
99002 - 57530 = ?
41, 472
345,134 + 56,134 = ?
401,268
4,107 x 763 = ?
3, 133, 641
A bus can hold 47 students. If there are 2,801 students going on a trip, how many buses are needed for all of the students to attend?
60 buses are needed for ALL students to attend.
Solve.
[32 + 8 – (5 x 3) + 7] ÷ 2
16
In a division problem, it is the total being split into equal groups.
What is the dividend?