Easy
Rico is trying to work out the average scores in a game of scrabble. Can you help him out by showing him a quick way to add these sets of numbers?
- 8 + 6 + 4 + 7 + 2 =
- 7 + 8 + 4 + 3 + 2 =
- 5 + 2 + 3 + 7 + 8 + 5 =
- 1 + 2 + 5 + 7 + 9 + 5 + 3 =
Medium
Madaline was given these number sentences in class – she wants to know if they are true or false – can you help her out using working to show each answer?
36 – 27 = 38 – 25 28 + 44 = 30 + 42
39 + 47 = 29 + 57 82 – 45 = 92 – 35
Hard
Harry knows in the average super-size bag of marshmallows there are 98 white ones. If there are 312 marshmallows altogether and he takes the white ones out – how many are left?
- Georgia knows there are 94 cans of dog food in two trolleys. How many cans of dog food would she have if she brought two trolleys but already had 188 cans at home?
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