Mental Math: Double-Digit Addition

4.3
(40 votes)10
English
Published
2 months ago

#1  Type answer  30 seconds  81% correct rate  

83 + 18 =

101

#2  Type answer  30 seconds  96% correct rate  

30 + 27 =

57

#3  Type answer  30 seconds  98% correct rate  

42 + 43 =

85

#4  Type answer  30 seconds  100% correct rate  

77 + 11 =

88

#5  Type answer  30 seconds  100% correct rate  

12 + 67 =

79

#6  Type answer  30 seconds  98% correct rate  

33 + 92 =

125

#7  Type answer  30 seconds  99% correct rate  

44 + 53 =

97

#8  Type answer  30 seconds  99% correct rate  

29 + 58 =

87

#9  Type answer  30 seconds  98% correct rate  

15 + 14 =

29

#10  Type answer  30 seconds  99% correct rate  

78 + 67 =

145

;