You could directly add 6+4 which gives you the answer as well... M=10
Answer:
Andy ate 9 doughnuts because 21-9=12
12-9=3.
Answer:
<em>78 eggs</em>
Step-by-step explanation:
13 × 6 = 78 eggs
Hope this helps! :)
Minus 9x from both sides
-3y=-9x+12
divide both sides by -3
y=3x-4
You can either do this on the calculator, or in your head. As its a larger number, it is worth doing it on the calculator.
413/14= 29.5
The alternative method is to list all of the tens multiples, and the smaller multiples when you're getting close to the answer, and this will be able to help you.
14x10= 140
14x20=280
14x30= 420 (which is slightly too big)
14x29= 406 (slightly too small)
14x29.5= 413
Hope this helps :)
