1. No
2. No
3. No
4. Yes
Can you use the equation to find 43 - 26?
1.
24 + 4 = 30 and 30 + 13 = 43
No
2.
26 + 10 = 36 and 36 + 3 = 39
No
3.
43 - 10 = 33 and 33 - 6 = 27
No
4.
43 - 20 = 23 and 23 - 6 = 17
43 - (20 + 6)
= 43 - 26
= 17
Therefore, only the 4th equation can be used to to find 43 - 26.