7 + 15 + 28 = 50
1138 15 29 57 ___From 8: add 7 = 1515 + (7 * 2) = 15 + 14 = 2929 + (14 * 2) = 29 + 28 = 5757 + (28 * 2) = 57 + 56 = 113
add to 15 and subtract to 7
They add up to 28
To find out what 7 more than 28 is, you simply add 7 to 28. So, 28 + 7 = 35. Therefore, 7 more than 28 is 35.
The GCF of 15 and 28 is 1. The factors of 15 are 1, 3, 5, and 15 The factors of 28 are 1, 2, 4, 7, 14, and 28 So the GCF of 15 and 28 is 1
Four 7s go into 28, as 28 divided by 7 equals 4. This means that if you add 7 four times (7 + 7 + 7 + 7), you will reach 28.
8-28 + 7-28= 15-28
15
List numbers that multiply to make 28 and find their sums. Since negative times a negative is positive, list the negatives. -1, -28 = -29 -2, -14 = -15 -4, -7 = -11 Aha! -4 and -7 multiply to make 28 and add to -11; therefore, -4 and -7 are the two numbers.
15 - 1, 3, 5, 15 28 - 1, 2, 4, 7, 14, 28 The GCF is 1
4
The two numbers that add up to -3 and multiply to -28 are -7 and 4. This is because -7 + 4 equals -3, and -7 × 4 equals -28.