8
round each number to the nearest 10, then
640 ÷ 80 = 8 ← estimate
Answer:
6457 + 7925 = 14382
The answer should be n=-8
Answer:
the answer is A.
just took the test e2020
Step-by-step explanation:
Answer:
3 and 7
Step-by-step explanation:
For problems like these I take the largest number in this case 10, and start writing out what 2 numbers would give me 10. 0+10, 1+9, 2+8, 3+7...while doing that I subtract the numbers as well. thus 3+7=10 3-7=-4