15 + _____ = 45
What is "30"
_____ - 4 = 11
What is "15"
_____ + 45 = 87 + 29
What is "71"
2 x _____ = 4
What is "2"
5 x _____ = 25
What is "5"
67 + ______ = 79
What is "12"
37 - ____ = 9
What is "28"
27 + 96 = 66 + _____
What is "57"
______ x 7 = 49
What is "7"
______ x 9 = 45
What is "5"
114 + ____ = 151
What is "37"
______ - 42 = 71
What is "113"
_____ - 156 = 79 + 245
What is "480"
10 x _____ = 700
What is "70"
2 x _____ x 3 = 12
What is "2"
745 + ______ = 811
What is "66"
450 - _____ = 321
What is "129"
457 - _____ = 259 + 157
What is "41"
_____ x 8 = 240
What is "30"
6 x _____ x 2 = 48
What is "4"
900 + _____ = 1552
What is "652"
5,667 - _______ = 3,002
What is "2665"
683 - _____ = 827 - 532
What is "388"
_____ x _____ = 9
What is "1 and 9" "9 and 1" or "3 and 3"
6 x 4 x ____ = 0
What is "0"