Shift both numbers FAQs

Answers about Shift both numbers flashcards, including when to use the shortcut and what to practice next.

How do Shift both numbers mental math flashcards work?

Each card shows a subtraction problem that fits Shift both numbers. If you get stuck, hints walk the same steps as the lesson: Add the same amount to both numbers. Stop when the smaller number is a friendly ten. Subtract. The difference stays the same.

Should I learn Shift both numbers before these flashcards?

Yes. Start with the Shift both numbers lesson at https://www.besparq.com/learn/mental-math/shift-both-numbers/learn so the shortcut is clear. Then use this deck to retrieve the answer without looking at the steps.

How many Shift both numbers flashcards are in a deck?

A standard Besparq Shift both numbers deck is 20 cards. Finish the deck, then try the 50-in-5 speed sheet if the answers feel automatic.

Do the Shift both numbers cards give the answer away?

No. The answer stays hidden until you check. Hints show the strategy steps, not the final number, so you still have to add the parts yourself.

What should I do after Shift both numbers flashcards?

Race the Shift both numbers speed sheet at https://www.besparq.com/learn/mental-math/shift-both-numbers/sheet, or return to all strategies at https://www.besparq.com/learn/mental-math.

How is Shift both numbers different from Count up to find the difference?

Shift both numbers is for this trigger: Shifting both numbers makes a friendlier subtraction. Count up to find the difference is a different shortcut (Add up from the smaller number to the bigger one.). Compare them on https://www.besparq.com/learn/mental-math/count-up-difference/learn.