MATH 1201 Chapter : 1201 Math Terms
Document Summary
Begin with zero one, two, three, ect first, second, third, ect. Egyptian numerals: the ancient egyptians used marks place value: position of the digit denominations: bundles composing a 10: when there are more than 9 coins in a column we compose a ten by bundling. 10 together and moving them to the next column. 9+6 =10 +5 easy by counting-on trivial, once taught pointed out and used learned through practice practiced as mental math. 9+1, 8+2, rearranging what in front of you to something that means the same, but looks differently: 13 6 = 7 (commutative property: counting down, 33 8 + 25, counting up, starts with subtrahend, 334 289, compensation mental math , 702 + 51 (move 1 over to 702) 3 + 0 = 3 can reverse terms and add in any order; commutative +associative allows to look at two not easily addable number and rearrange them so they are easier to add.
