Math practice · Week 32 · Wednesday
I can add three-digit numbers and trade when I need to.
Look: 268 + 457
- Ones: 8 + 7 = 15. Trade 10 ones for 1 ten. Write 5.
- Tens: 1 + 6 + 5 = 12 tens. Trade 10 tens for 1 hundred. Write 2.
- Hundreds: 1 + 2 + 4 = 7. The answer is 725.
Draw squares, sticks and dots for the first two. Use columns for the rest. Circle each trade.
- 236 + 158 = ____Answer: 394
- 374 + 249 = ____Answer: 623
- 485 + 316 = ____Answer: 801
- 157 + 638 = ____Answer: 795
- 609 + 283 = ____Answer: 892
Solve.
- A school collected 359 cans on Monday and 276 cans on Tuesday. How many cans in all?Answer: 635 cans (359 + 276 = 635)
Challenge
- Which problems needed two trades? Put a star next to them.Answer: 374 + 249, 485 + 316 and the can problem (359 + 276).
Second Grade · Week 32 · Wednesday · secondgrade.com