2-min Fluency Warm-up — Mental math.
81 − 10 =
43 + 10 =
600 − 100 =
100 + 100 =
These are real situations. Think carefully about what to do.
The zoo had 89 animals last month. This month, 23 new animals arrived but 15 animals were moved to another zoo. How many animals are at the zoo now?
Draw or write your thinking:
animals
Lily read 34 pages of her book on Monday and 28 pages on Tuesday. The book has 100 pages total. How many pages does she still need to read?
Draw or write your thinking:
pages
A farmer grew 67 carrots and 45 tomatoes in his garden. He sold 58 vegetables at the market. How many vegetables does he have left?
Draw or write your thinking:
vegetables
Number Talk — Explain WITHOUT calculating.
If 56 + 34 = 90, what is 56 + 36?
My thinking:
If 83 − 27 = 56, what is 93 − 27?
My thinking:
Solve step by step.
Emma has 48 crayons. She buys 27 more at the store. Then she gives 19 crayons to her little brother for his birthday. How many crayons does Emma have now?
Step 1: After buying more:
Step 2: After giving away: crayons
Create Your Own Problem
Write a word problem that has TWO steps — one addition and one subtraction. Use a topic you enjoy (sports, animals, food, etc.). Then solve it.
Step 1:
Step 2: