Starter quiz
What is the missing number in this part-whole model?- '628' ✓
What is the missing number in this part-whole model?- '0.73' ✓
In digits, write the number being represented by the place value counters.- ' 5,301.3' ✓
- What is the complement to 1 of 0.654?
- 0.355
- 0.346 ✓
- 0.364
- 0.366
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- What is the complement to 1 for 0.654?
- '0.346' ✓
- What is the unknown in this equation? 435,000 + ______ = 425,000 + 16,000
- '26,000' ✓
Exit quiz
- What does an equation show?
- Numbers and operation symbols together.
- It is another word for an expression.
- That one number, calculation or expression is equal to another. ✓
- The solution to a problem.
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- What known fact is most helpful in completing the following calculation in your head? 134 + 5 = 139
- 4 + 5 = 9 ✓
- 101 + 8 = 109
- 100 + 30 = 130
- 100 + 5 = 105
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- Find the missing number mentally (use jottings if needed). ______ = 67.24 + 0.76
- '68' ✓
- Find the missing number mentally (use jottings if needed). 15.65 + 0.34 = ______
- '15.99' ✓
- Find the missing number mentally (use jottings if needed). 68,000 + 232,000 = ______
- '300,000' ✓
- Find the missing number mentally (use jottings if needed). ______ = 456,000 + 31,000
- '487,000' ✓
Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- If I increase this addend by __ then the sum will increase by the same amount.
- If I decrease this addend by __ then the sum will decrease by the same amount.
- A balance beam can represent unequal expressions or inequalities.
Common misconception
Pupils may find it hard to understand that recalculating the adjusted part is an unnecessary step.
Display two sets of workings side-by-side. In the 1st, show the adjusted part being recalculated. In the 2nd, show it without recalculating the part. Pupils will hopefully see that the solution emerges from both.
Keywords
Equation - An equation is used to show that one number, calculation or expression is equal to another.
Adjustment - An adjustment is a change to a number using either subtraction or addition.
Whole - The whole is all the parts or everything, the total amount.
Part - A part is a piece or section of the whole.
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