420
420
421 rounded to nearest tens is 420
420
420
400
400
25,690,421 to the nearest millions place is 26,000,000.
0.089
42.1
Oh honey, 421 rounded to the nearest hundred is 400. It's not rocket science, just chop off those last two digits and call it a day. Math doesn't have to be a headache, darling.
400