[ 3 ] [ 10/3 truncate ] unit-test
[ -3 ] [ -10/3 truncate ] unit-test
-[ -1/2 ] [ 1/2 1- ] unit-test
-[ 3/2 ] [ 1/2 1+ ] unit-test
+[ -1/2 ] [ 1/2 1 - ] unit-test
+[ 3/2 ] [ 1/2 1 + ] unit-test
-[ 1 ] [ 0.5 1/2 + ] unit-test
-[ 1 ] [ 1/2 0.5 + ] unit-test
+[ 1.0 ] [ 0.5 1/2 + ] unit-test
+[ 1.0 ] [ 1/2 0.5 + ] unit-test
[ 1/268435456 ] [ -1 -268435456 >fixnum / ] unit-test
[ 268435456 ] [ -268435456 >fixnum -1 / ] unit-test