Decide whether a situation calls for addition or subtraction.
Choose the Operation is the game. Decide whether a situation calls for addition or subtraction. Watch shows 14 + 5 = 19, then 14 − 5 = 9, then 28 + 16 = 44, then 36 − 14 = 22. More are coming. Blue blocks walk toward the pile, so tap +. Some are leaving. Blocks walk away from the pile, so tap −. The line is 14 □ 5 until the sign is chosen. Try it. Then six scored stories. Score, Streak, and hearts start after Try it. Built for 2nd grade.
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How to Play Choose the Operation
Watch
Watch. Decide whether a situation calls for addition or subtraction. 14 + 5 = 19, then 14 − 5 = 9, then 28 + 16 = 44, then 36 − 14 = 22. More are coming. That is +. Some are leaving. That is −.
Try it
Try it. Decide whether a situation calls for addition or subtraction. The line is 14 □ 5. Tap + or −. More are coming. Some are leaving. 14 + 5 = 19. 14 − 5 = 9. The equation stays until you go on. The hearts stay hidden through Try it.
Choose the Operation
Choose the Operation. Decide whether a situation calls for addition or subtraction. Six new stories. More are coming. Some are leaving. 28 + 16 = 44. 36 − 14 = 22.
Score
A finished story adds Score and Streak. The wrong sign clears the Streak and costs a heart. Three misses and the run is Done. Again starts over. Best is saved. Sound and Mute sit on the bar. A higher Score is a New best.
Key Features
Decide whether a situation calls for addition or subtraction.
Watch. 14 + 5 = 19. 14 − 5 = 9. 28 + 16 = 44. 36 − 14 = 22. More are coming. Some are leaving. Tap + or −. Try it. Decide whether a situation calls for addition or subtraction.
14 + 5 = 19
More are coming. 5 blue blocks walk toward the pile of 14. The line is 14 □ 5. Tap +. The blocks join the pile. The pile shows 19. 14 + 5 = 19.
14 − 5 = 9
Some are leaving. 5 blocks walk away from the pile of 14. The line is 14 □ 5. Tap −. The pile shows what stays. 14 − 5 = 9.
28 + 16 = 44
More are coming. 16 blue blocks walk toward 28. Tap +. 36 − 14 = 22 is the other story: Some are leaving, so tap −.
Score and Streak
Score and Streak wait until after Watch and Try it. A finished story adds Score and grows the Streak. The wrong sign shakes the board, clears the Streak, and costs a heart. Three misses and the run is Done.
Best
Best is kept on this device. A higher Score at the end is a New best. Again starts a new run. Sound and Mute sit on the bar.
What is Choose the Operation?
Choose the Operation is a 2nd grade game. Decide whether a situation calls for addition or subtraction. Watch 14 + 5 = 19, 14 − 5 = 9, 28 + 16 = 44, and 36 − 14 = 22. More are coming. Some are leaving. Try it. Tap + or −.
Why Play Choose the Operation?
Addition
Decide whether a situation calls for addition or subtraction. More are coming. Blue blocks walk toward the pile. 14 + 5 = 19. Tap +.
Subtraction
Some are leaving. Blocks walk away from the pile. 14 − 5 = 9. Tap −. 36 − 14 = 22 is the same kind of story.
A miss you can feel
The wrong sign shakes the board and puts the story back. A finished story adds Score.
Frequently Asked Questions
How do I decide whether a situation calls for addition or subtraction?
Watch 14 + 5 = 19, 14 − 5 = 9, 28 + 16 = 44, and 36 − 14 = 22. Then Try it. More are coming. That is +. Some are leaving. That is −.
When is the sign +?
More are coming. Blue blocks walk toward the pile. 14 + 5 = 19. 28 + 16 = 44. Tap +.
When is the sign −?
Some are leaving. Blocks walk away from the pile. 14 − 5 = 9. 36 − 14 = 22. Tap −.
What is 14 + 5?
19. More are coming. The 5 blue blocks join the 14, and the pile shows 19.
How does Score work?
Score and Streak start after Watch and Try it. A finished story adds Score. The Streak makes the next story worth more. The wrong sign clears the Streak. Best is saved. A higher Score at the end is a New best. Again starts a new run. Three misses and the run is Done.
Where are Sound and Mute?
Sound and Mute sit on the bar. Tap the button to switch.
Who is Choose the Operation for?
Choose the Operation is for 2nd grade. Decide whether a situation calls for addition or subtraction.