Cleo and Blake are back in the prehistoric times to solve more maths problems. Help them to add three 1-digit numbers as they continue to explore.
More resources for Autumn Block 2 Step 16.
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Discussion points for teachers
1. Fill in the boxes below to show the number of each type of egg. What is the total of all of the eggs?
Discuss how many dinosaur eggs can be seen in each colour. Discuss putting this into the calculation. Discuss which numbers would be easiest to add first and why.
7 + 3 + 6 = 16
2. Help Cleo work out the total number of items she has in her backpack. Discuss how many of each item Cleo has.
Discuss how we could write this into a calculation. Would we use numerals or words? Discuss which numbers would be easiest to add first and why.
seven + seven + six = twenty
3. Help Blake to count how many pterodactyls can be seen over head by writing the numbers into the boxes below and then find the total.
Discuss how many pterodactyls can be seen in each group. Discuss writing this into the calculation. Discuss which pair of numbers would be the easiest to add first and why.
6 + 4 + 9 = 19
4. Help Cleo and Blake to find the route across the river which has the most steppingstones. Write a calculation for each route and use the comparison symbols to compare the three answers.
Discuss how many stones can be seen in each group and how we would write this into the calculation. Discuss which groups of stones would be easiest to add together first for each route. Discuss which comparison symbols we could use to order the totals.
A. 9 + 8 + 5 = 22; B. 9 + 9 + 5 = 23; C. 8 + 8 + 4 = 20 23 > 22 > 20 or 20 < 22 < 23
Optional discussion points:
Discuss how we know which number must come first when using the comparison symbols.
National Curriculum Objectives
Mathematics Year 2: (2C2a) Add and subtract numbers mentally, including: adding three one-digit numbers
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