Mathematics:
Examples
Problems
Arithmetic
Calculators
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Subtract till 100
Calculate:
Number of examples:
Numerical difficulty:
Range of values:
Multiplicity:
48

31
=
95

23
=
73

44
=
89

44
=
50

31
=
40

30
=
86

3
=
95

7
=
71

49
=
97

36
=
all examples
3810
5th grade (10y)
386
6th grade (11y)
941
7th grade (12y)
1522
8th grade (13y)
2000
9th grade (14y)
1790
high school
1283
equation
926
reason
632
time
527
right triangle
520
system of equations
509
triangle
467
area of shape
449
Pythagorean theorem
442
volume
436
percentages
409
unit conversion
401
length
400
expression of a variable from formula
394
body volume
370
The most difficult examples
The easiest examples
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