1. 142
   132
2. 143
   152

Easy way to do it: round 97 up to 100, add the 45, then take off the 3 for the rounding up you did. Follow? It's 142.

1. 104
   114
2. 115
   124

That's right, 114. Round both the numbers up. So 30 plus 90. That would be 120, then remove the 3 and 3 to get 114.

1. 83
   79
2. 81
   77

Round up the 36 to 40, then add it to 45 to get 85. Then take off 4 for the rounding up. You have 81!

1. 180
   171
2. 169
   170

8+8 is 16, so 80+80 is 160. Then add 1+9, which is 10. 160+10=170. Just one way to do it.

1. 113
   124
2. 111
   112

The answer is 113. How? Well 39 is close to 40, so you could add 40 to 74, which would be 114, then you have to minus the 1 to get 113.

1. 142
   132
2. 122
   112

132, it's an even number. An easy way to get this answer is to add the first 80 and the first 40 to get you to 120 and then add the remaining 8 and 4 to get 12. Added together, it's 132.

1. 90
   99
2. 96
   81

Round 72 down to 70, add 24 to get 94, then add the 2 that you rounded down. That's how you could have gotten to 96. Did you do it that way?

1. 31
   20
2. 29
   30

10+10+4+6=30. A different way of adding things... There are many ways to come to the correct answer on a math problem.

1. 118
   120
2. 108
   128

118, but you knew that! How did you get there? We added 50 plus 60 to give us 110 and then the 2 and the 6 for 118. Easy when you know how!

1. 130
   120
2. 119
   121

A simple one. Just turn the 99 into 100, add 21, and then minus the 1 to get 119. But you got that, right?

1. 122
   111
2. 112
   101

70 and 40 would be 110, then add the extra 1 and 1 to get 112. So many bananas!

1. 157
   161
2. 180
   160

The answer is 160. 70 plus 80 is 150, and then add 9 and 1 to get 160.

1. 58
   60
2. 57
   66

Too simple! Hey, we gotta give a few easy ones. 30+20 is 50, and then add the 7 and the 1 to get 8. 58 in total.

1. 190
   191
2. 199
   156

Let's get this one in a little different way. 100 plus 100 is 200. So take 1 away for 99 and 8 away for 92. Therefore, the answer is 191. Got it?

1. 124
   134
2. 144
   166

Round up the 58 to 60. Now round down the 76 to 70. Add them together to get 130. You need to take off two for rounding up (58 to 60) and add 6 for rounding down (76 to 70). And that equals 134.

1. 130
   110
2. 120
   119

You must have gotten this one with ease! It's 120. Just drop the zeros. 9 and 3 is 12, so 90 and 30 is 120.

1. 100
   99
2. 110
   140

Yeah, we bet this one didn't really test you. Both numbers are multiples of 25, and when added together they come to 100.

1. 78
   84
2. 81
   799

6 and 1 is 7, then 3 and 8 is 11. So through that little equation, we can see the answer is 81.

1. 117
   121
2. 101
   110

Take 75, add 40 and you have 115. Now take off 1 for rounding up to 75 and add 3 for rounding up to 40. And then you have 117. Makes sense, right?

1. 123
   133
2. 136
   141

A little tougher, this one. Did you get 133? Well done. We got there this way. We rounded up 88 to 100, added 45 and then took away the 12 for the rounding up. That is 133. Simple when you know how, right?

1. 78
   87
2. 89
   88

Crazy 88! Basic math skills would see you cruise this question. We're going to have make it a little bit more difficult next time.

1. 94
   73
2. 83
   90

Tummy ache! Don't eat them all. No seriously, the answer is 83. Make sure you share them around!

1. 127
   140
2. 139
   137

Well, 5 and 8 is 13, so we know it is 130 something. Add the 6 and 1 and you have 7, so it must be 137!

1. 110 miles
   120 miles
2. 100 miles
   99 miles

A long way from your starting point! In all seriousness, 30 and 70 is 100, and then add another 4 and 6 which is 10. Altogether, 110 miles.

1. 120
   119
2. 121
   131

A hell of a lot of orange juice... if you have the time to squeeze them, that is! Again, the easy way to add this is to take 60 and 50, which is 110, and then add the 6 and 4 which is another 10, giving you 120.

1. 177
   190
2. 185
   165

That's an odd number but relatively easy to get to, don't you think? Just round the 98 to 100, add the 87 for 187, then remove the 2 from the rounding up. That leaves you with 185.

1. 39
   38
2. 36
   40

No doubt you nailed this. Its simple math, really. The answer is 38

1. 71
   81
2. 62
   61

The start of a McDonald's franchise? Just kidding. 50 + 14 would be 64, but then take away the 3 for rounding up and you have 61 potatoes!

1. 130
   120
2. 150
   14-0

Too simple! A 5th-grader knows that the answer is 130.

1. 149
   148
2. 151
   145

Round up the 91 to 100, add 57 for 157, then minus the 9 from the rounding up. You are left with 148.

1. 134
   133
2. 131
   137

5 and 7 are 12, so that equates to 120, then add 9 and 5 which is 14, so 120 plus 14 is 134! Easy enough.

1. 99
   100
2. 101
   92

Just 1 more than 100: 101! And we got there like this. 6 and 5 are 11 and 60 and 30 are 90. Added together, it's 101.

1. 71
   75
2. 77
   79

The answer is 75 pieces of candy and an unhappy brother. Don't eat them all, that's just going to lead to a sore stomach. And who can eat 75 pieces of candy, anyway?

1. 111
   112
2. 114
   124

30 plus 80 gives you 110. Then add 3 and 1 and you have 114.

1. 123
   133
2. 121
   120

Did you get it right? It's 123. You could have gotten there this way. Round up the 89 to 100, add the 34 for 134, then minus the 11 from the rounding up to get 123.