Vocabulary
Addition
Subtraction
Multiplication
Division
100
Divide mentally by a one-digit divisor
What is Short Division
100
10+7
What is 17
100
10-4
What is 6
100
12x7
What is 84
100
12/3
What is 4
200
The answer to a multiplication problem
What is the Product
200
23+17
What is 40
200
38-17
What is 21
200
7.24x5.1x3
What is 110.772
200
53.8 ÷ 1000
What is 0.0538
300
When one number divides the other evenly
What is Compatible Numbers
300
17+12+78
What is 107
300
67-47
What is 20
300
(-4)x5
What is -20
300
490135 ÷ 5
What is 98,027
400
Adding the front digits
What is Front-end Estimation
400
17-(-21)
What is 38
400
-21-16
What is -37
400
3^4
What is 81
400
0.732 ÷ 6
What is 0.122
500
The rules are: - One factor is a number greater than or equal to 1, but less than 10 - The other factor is a power of 10
What is Scientific Notation
500
134+17.8+45.7+98+5.347
What is 300.847
500
13456735-2635489
What is 10821246
500
2.55x10^7
What is 25,500,000
500
1 ÷ 0.001
What is 1000
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