2-min Fluency Warm-up — Mental math. Go fast!
53 + 10 =
68 − 10 =
91 + 10 =
74 − 10 =
Pro Strategy: Group "Friendly Numbers"
Look for two numbers that add up nicely (to 10, 20, 30...).
18 + 32 + 25
18 + 32 = 50 ← nice round number!
50 + 25 = 75
43 + 7 + 29
43 + 7 = 50 ← nice round number!
50 + 29 = 79
Circle the two numbers that are easiest to add first, then solve.
25 + 15 + 38 =
I added ______ and ______ first because
6 + 34 + 22 =
I added ______ and ______ first because
40 + 28 + 12 =
I added ______ and ______ first because
53 + 7 + 19 =
I added ______ and ______ first because
Look for friendly numbers in these problems.
At lunch, 18 kids ate chicken nuggets, 12 kids ate sandwiches, and 27 kids ate pizza. How many kids ate lunch?
Draw or write your thinking:
kids
The garden has 24 red flowers, 6 yellow flowers, and 35 blue flowers. How many flowers are in the garden?
Draw or write your thinking:
flowers
Two Ways! Solve 16 + 24 + 8 two different ways. Pick a different pair to add first each time.
Way 1: I added + first. Total:
Way 2 (another way): I added + first. Total:
Did you get the same total both ways? Why?
Challenge: Can you make 100?
Fill in the blanks so all three numbers add up to 100. There are MANY answers!
+ + = 100
Show your work: