Ages 6–7🧮 Mathematics11 verified questions on this shelf
Inverse: addition undoes subtraction
Recognise and use the inverse relationship between addition and subtraction to check calculations and solve missing-number problems
Try three questions
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Question 1 of 3
What number belongs in the box? □ + 6 = 13
Question 2 of 3
Lily had some beads. She took away 5 beads, then added 9 beads, and now has 21 beads. How many beads did she start with?
Question 3 of 3
What number should replace the box in the equation □ + 8 = 13?
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