Two-Digit
Addition
Our assumption is that you know how to add and subtract
one-digit numbers. We will begin with two-digit addition, something I suspect
you can already do fairly well in your head. The following exercises are good
practice, however, because the two-digit addition skills that you acquire here
will be needed for larger addition problems, as well as virtually all multiplication
problems in later lessons. This...
Sunday, June 1, 2014
Three-Digit Addition
Three-Digit Addition
The strategy for adding three-digit numbers is the same as
for adding two-digit numbers: you add from left to right. After each step, you
arrive at a new (and simpler) addition problem. Let’s try the following:
473
+326(300+20+6)
Starting...
Labels:
Maths Tricks
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