Mathematics
Remember?
3 quick questions from earlier weeks · about 3 minutes
- 13 − 9 = ? Facts to 20
- Would you measure a room in meters or in centimeters? Week 20
- Nina has 18 beads. Nina gets 31 more. How many beads now? Week 18
Objective: Students will solve addition word problems about lengths in the same unit by drawing a picture and writing an equation (2.MD.B.5).
- 10 min — Warm-Up: Your child estimates and then measures a piece of string you cut to 15 inches. Ask: 'If I tie on another string that is 10 inches, how long is the whole string?' Let them add and then tie and measure to check (about 25 inches).
- 15 min — Mini-Lesson: Adding Lengths: Read this problem aloud: 'Maya has a ribbon that is 24 inches long. She buys another ribbon that is 18 inches long. How many inches of ribbon does she have altogether?' Draw one long bar split into a 24 part and an 18 part, write 24 + 18 = ?, solve it (42 inches), and check by cutting real ribbon or string to those lengths and measuring the total.
- 15 min — Practice: Length Stories: Your child draws a bar model and writes an equation for each of these three problems. 1: 'A garden row of carrots is 36 inches long and a row of beans is 27 inches long. How long are both rows together?' (63 inches). 2: 'Jonah walks 45 meters to the mailbox and then 38 more meters to the park. How far did he walk?' (83 meters). 3: 'A caterpillar crawled 19 centimeters, rested, then crawled 32 more centimeters. How far did it crawl?' (51 cm).
- 5 min — Wrap-Up: Ask: 'What did all three problems have in common?' (putting two lengths together, same unit). Your child writes 'Add lengths when you put them together' in their journal.
Materials: string cut to 15 inches and 10 inches, ribbon or string, ruler or tape measure, paper, pencil, crayons, math journal