2-min Fluency Warm-up — Mental math.
400 + 100 =
700 − 100 =
100 + 100 =
900 − 100 =
Estimate First! Round to hundreds, estimate, then solve.
248 + 135
Estimate (200 + 100):
Actual:
604 − 237
Estimate (600 − 200):
Actual:
Solve each using your best strategy.
156 + 234 =
487 − 215 =
368 + 145 =
620 − 378 =
Read carefully. Show your work.
The bookstore had 524 books. They sold 186 books on Saturday and 97 books on Sunday. How many books are left?
Draw or write your thinking:
books
Self-Check: How do you feel about 3-digit addition and subtraction?
Adding 3-Digit Numbers
😊 I got it! | 😐 Getting there | 😟 Need help
Subtracting 3-Digit Numbers
😊 I got it! | 😐 Getting there | 😟 Need help
Estimating 3-Digit Sums/Diffs
😊 I got it! | 😐 Getting there | 😟 Need help
One thing I learned this week:
One thing I want to practice more: