2-min Fluency Warm-up — Mental math. Go fast!
76 − 10 =
52 + 10 =
300 + 100 =
500 − 100 =
Estimate First! Round to tens, estimate, then solve.
34 + 27 + 18
Estimate (30+30+20):
Actual:
45 + 16 + 33
Estimate (40+20+30):
Actual:
Use the strategy you like best.
18 + 22 + 40 =
35 + 15 + 20 =
27 + 33 + 19 =
42 + 8 + 50 =
Read carefully. Show your thinking.
The book fair sold 26 science books, 14 animal books, and 20 space books. How many books were sold in all?
Draw or write your thinking:
books
Self-Check: How do you feel about adding 3 numbers?
Grouping Friendly Numbers
😊 I got it! | 😐 Getting there | 😟 Need help
Estimating 3-Number Sums
😊 I got it! | 😐 Getting there | 😟 Need help
Solving 3-Number Word Problems
😊 I got it! | 😐 Getting there | 😟 Need help
One thing I learned this week:
One thing I want to practice more:
My favorite strategy for adding 3 numbers: