name the symbols
what symbol is this "+" in a math equation?
plus sign
1-1=?
20-10=?
10
100-100=?
0
Is 100-100= 1?
No! 100-100=0. If you have 100 erasers and give away 100 then you would have none left.
what symbol is this "-" in a math equation?
minus sign
10-3=?
7
45-10=?
35
100-50=?
50
Does 10-5=5?
Yes, if you start at 10 on a number line and take away 5 you will have 5 left.
what symbol is this "=" in a math equation?
equal sign
75-4=?
71
88-18=?
70
100-70=?
30
Does 12-2=9?
No, if you have 12 and take away 2 it will equal 10. Start at 12 on your number line and take away 2 by moving to the left 2 spaces and you will land on 10 as your answer.
what symbol is this "x" in a math equation?
times sign
29-5=?
24
63-12=?
51
100-32=?
68
Does 20-10=11
No! 20-10=10 not eleven.
what symbol is this "÷" in a math equation?
Lily has 7 apples. She gives 3 apples to her friend. How many apples does Lily have left?
7 - 3 = 4
Lily has 4 apples left.
Tom has 50 marbles. He gives 20 marbles to his friend. How many marbles does Tom have left?
50 - 20 = 30
Tom has 30 marbles left.
Sarah has 100 candies. She eats 38 of them. How many candies does Sarah have left?
100 - 38 = 62
Sarah has 62 candies left.
If Ms. Erin has 0 slices of pizza and wants to give Mrs. Grinnell one slice, can she give her a slice?
No! If Ms. Erin has no slices of pizza, then she can't give one. She can't give something away that she doesn't have.