Which sum is GREATEST: 3+4, 2+5, 1+8, or 4+4? — 1+8=9.1+8=9 is the greatest sum. 9 is more than 7 or 8!
9 + 1 = ? — 10.9 + 1 = 10. Nine plus one equals ten — a complete group!
You add 0 to any number. What happens? — The number stays the same.Adding zero never changes a number: 7 + 0 = 7!
If 3 + 4 = 7, what is 4 + 3? — 7.4 + 3 = 7 also! Addition is commutative — order does not change the answer!
Max has some toy cars. He gets 3 more and now has 9. How many did he START with? — 6.___ + 3 = 9, so 9 − 3 = 6. He started with 6 cars!
Which addition fact helps you most quickly solve 8 + 2? — Number bonds: 8+2=10.Knowing number bonds to 10: 8 + 2 = 10 is the fastest way!
There are 5 boys and 4 girls on the playground, plus 1 teacher. How many people in all? — 10.5 + 4 + 1 = 10. Five plus four is nine, plus one more is ten people!
The TOTAL is another word for: — The sum when you add.TOTAL means the sum — the answer when you add all groups together!
Can the answer to a subtraction problem be BIGGER than the number you started with? — No, never.When you take things away, you always end up with the same or fewer — never more!
If 5 + 3 = 8, what is 8 − 3? — 5.Addition and subtraction are partners. If 5 + 3 = 8, then 8 − 3 = 5!
Lily has some flowers. She gives 4 away and has 5 left. How many did she START with? — 9.___ − 4 = 5, so 5 + 4 = 9. Lily started with 9 flowers!
Which is the BIGGEST answer: 10−1, 9−0, 8−2, 7−1? — 9−0=9.9−0=9 and 10−1=9 both equal 9. But 9−0 is listed among the answers and equals 9 (tied with 10−1)!
A number minus ITSELF always equals: — 0.Any number minus itself = 0. For example: 8 − 8 = 0, 100 − 100 = 0!
What does "difference" mean in subtraction? — The answer (what is left).The DIFFERENCE is the answer to a subtraction problem — how much is left after taking away!
Jake has 10 stickers total. He puts some on his notebook and 7 on his folder. How many are on his notebook? — 3.___ + 7 = 10, so 10 − 7 = 3. Three stickers are on his notebook!
Using the bond 2 + 8 = 10, what is 10 − 8? — 2.Number bonds work both ways: if 2 + 8 = 10, then 10 − 8 = 2!
Which ADDITION fact and SUBTRACTION fact both use the numbers 5, 5, and 10? — 5+5=10 and 10−5=5.5 + 5 = 10 and 10 − 5 = 5 — they are the same bond shown two ways!
How do bonds to 10 help with BIGGER numbers? (Example: 8 + 2 = 10, so 18 + 2 = ?) — 20.If 8+2=10, then 18+2=20. The ones digits work the same way!
Emma has 10 grapes. She eats some, and 4 are left. How many did she eat? — 6.___ + 4 = 10 → 6 + 4 = 10. Emma ate 6 grapes!
Which fact family includes the numbers 3, 7, and 10? — 7+3=10 and 3+7=10 and 10−3=7 and 10−7=3.A fact family shows all related addition and subtraction facts: 3+7=10, 7+3=10, 10−3=7, 10−7=3!
If you know ALL bonds to 10, how many individual number sentences do you know? — 20.Each bond gives 2 addition facts (e.g. 3+7 and 7+3). With 11 bonds (0+10 … 5+5) we get more than 20, but the core pairs give about 20 related facts!
Which step comes LAST when solving a story problem? — Check if the answer makes sense.Always CHECK that your answer makes sense in the story — it is the final step!
Ron has some marbles. He gets 4 more and now has 9. How many did he start with? — 5.___ + 4 = 9, so 9 − 4 = 5. Ron started with 5 marbles!
Mom bakes 10 muffins. The family eats some, and 3 are left. How many were eaten? — 7.10 − ___ = 3, so 10 − 3 = 7. The family ate 7 muffins!
A story says: "Jan had 5. She got more. Now she has 8." Which number sentence fits? — Both B and C.Both 5 + 3 = 8 (what Jan added) and 8 − 5 = 3 (how many she got) describe the same story!
Can you solve a subtraction story by using addition? (Example: 7 − 4 = ___, think: 4 + ___ = 7) — Yes, think of the missing addend.Yes! You can use addition to check subtraction: 4 + ? = 7 → ? = 3, so 7 − 4 = 3!
There are 6 apples and 4 oranges in a bowl. 3 apples are eaten. How many fruits remain? — 7.Total = 6 + 4 = 10. Then 10 − 3 = 7. Seven fruits remain!
Which tells you a problem needs SUBTRACTION? — "How many are left after some fly away?"."How many are LEFT after some go away?" signals subtraction — we take away and find the remainder!