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Maths · Grade 1 · Set B
Add three groups
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B
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Goal: 15 min
Score/ 11
Remember: Find two numbers that make ten and add them first. The order does not change the total.

Add three groups

Look for two numbers that make ten. Add them first.

1
Add the three groups. How many ducks in all?
2
6 + 4 + 8 =
3
Which two numbers do you add first in 7 + 5 + 3?
7 and 55 and 37 and 3
4
3 + 7 + 6 = 10 +
5
5 + 2 + 5 = 12.
TrueFalse
6
4 + 4 + 4 = 10.
TrueFalse
7
Sam has 2 red balls, 6 blue balls and 4 green balls. How many balls does Sam have?

Think about it

8
Join each sum to its total.
  1. 13 + 3 + 4
  2. 25 + 5 + 6
  3. 32 + 7 + 8
  • A17
  • B16
  • C10
9
Which number sentence tells the picture?
5 + 3 + 6 = 145 + 3 + 6 = 135 + 3 + 5 = 13
10
Pip counts beads of three colors. How many beads in all?
11
2 + 9 + 8 and 8 + 9 + 2 make the same total.
TrueFalse
12
Draw three groups of stars that have 11 stars in all.
13
Make up a story with 3 groups. Write the number sentence.
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Answer key · Set B
Add three groups
115 4 and 6 make 10. Then 10 and 5 more is 15.
218 6 and 4 make 10. Then 10 and 8 more is 18.
37 and 3 7 and 3 make ten, and ten is an easy number to add to.
46 3 and 7 make 10. So 3 + 7 + 6 is 10 and 6 more.
5True 5 and 5 make 10. Then 10 and 2 is 12.
6False 4 and 4 is 8. Then 8 and 4 is 12.
712 2 and 6 make 8. Then 8 and 4 is 12.
81-C, 2-B, 3-A 3 + 3 + 4 is 10, 5 + 5 + 6 is 16 and 2 + 7 + 8 is 17.
95 + 3 + 6 = 14 5, 3 and 6 are the three groups. 5 + 3 + 6 is 14.
1019 8 and 2 make 10. Then 10 and 9 is 19.
11True Order does not matter. Both bars are the same length: 19.
13Your own words: a grown-up reads it.
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