If 8.81 + 2.78 = 8.8 plus Xthen, since 8.81 is nearly equal to 8.8
a good estimate for X is 2.78.
To estimate a number you round it up to easier number so 387 would be 400. 945 would be 950 and 1024 would be 1030. so 400 and 950 would be 1350 plus 1030 equals 2380 you could even round it up easier so 400 plus 900 and 1000 equals 2300
That equals 16.7 which would be between 15 and 18.
nothing at all
Na+ plus OH- plus H+ equals H2O plus Na+ plus Cl-
333 + 110 = 390 + 53
100 That is an estimate.
That equals 16.7 which would be between 15 and 18.
To estimate a number you round it up to easier number so 387 would be 400. 945 would be 950 and 1024 would be 1030. so 400 and 950 would be 1350 plus 1030 equals 2380 you could even round it up easier so 400 plus 900 and 1000 equals 2300
That equals 559. If you have to, estimate 210 + 350 = 560
nothing at all
Na+ plus OH- plus H+ equals H2O plus Na+ plus Cl-
You use Plus as a symbol in Maths. Example, 2 Plus 2 equals 4. Or in symbols it would be 2+2=4. __________________________ Plus = + Equals = = (Equals equals =)
333 + 110 = 390 + 53
To estimate 7.2 plus 9.5, you could simply add the 7 and the 9 first. This would give you an answer of 16. Then, add the .2 and the .5 to get .7. Stick the .7 on the end of the 16 and you have the actual answer to the equation. That equals 16.7 If you have to estimate, 7 + 10 = 17
I would think -5 plus 5 equals 0.
300+60=360
The second equation is not complete and there is not sufficient information for a solution. It would make no sense for me to guess what a + b equals since, in that case, I may as well start posting my own questions and answering them!