MathsFreePrintable
True Equation Thinking
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Name:Date:
True Equation Thinking
Decide whether each number sentence is true or false. Explain how you checked it. You can use addition and subtraction facts to help.
Check each equation
Choose True or False, then show or explain how you know.
1.Is 34 + 20 = 54 true or false? Explain how you checked.
2.Is 62 − 28 = 44 true or false? Show how you know.
3.Is 27 + 8 = 35 true or false? Explain your thinking.
4.Is 80 − 36 = 54 true or false? Show how you checked.
Use related number sentences
Addition and subtraction are connected. Use one fact to help you work out another.
5.If 23 + 14 = 37, complete the related subtraction: 37 − 14 = .
6.Is 46 + 19 = 64 true or false? Use a related subtraction to check.
TrueFalse
7.Is 71 − 26 = 45 true or false? Write a related addition to check.
TrueFalse
Think a little further
Complete the number sentences and check that both sides are equal.
8.Complete this true addition equation: 28 + = 43.
9.Write the related subtraction equation for 28 + 15 = 43.
10.Is 52 + 18 − 9 = 61 true or false? Show the steps you used.
11.The number sentence 36 + 17 = 52 is not correct. Write the correct total, then use it to make a related subtraction equation.
2 printable pages
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Page 2
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