Math practice · Week 9 · Wednesday
I can subtract three-digit numbers by opening a ten or a hundred.
Look: 562 − 318
- Draw 562. You need to take 8 ones but have only 2.
- Cross out 1 stick and draw 10 dots. Now you have 5 squares, 5 sticks, 12 dots.
- Take away 8 dots, 1 stick, 3 squares. You have 2 squares, 4 sticks, 4 dots = 244.
Draw the first number. Open a ten or a hundred when you need to. Cross out to subtract.
- 574 − 238 = ____Answer: 336
- 736 − 482 = ____Answer: 254
- 851 − 327 = ____Answer: 524
- 625 − 348 = ____Answer: 277
Challenge
- Check 574 − 238 by adding: 336 + 238 = ____Answer: 574
Second Grade · Week 9 · Wednesday · secondgrade.com