1.	Estimate the difference to the nearest ten. 626 − 187
		A.	400	B.	440
		C.	450	D.	430
		Hint
	2.	Estimate the difference to the nearest ten. 298 − 108
		A.	180	B.	170
		C.	200	D.	190
		Hint
	3.	Estimate the difference to the nearest ten. 143 − 82
		A.	60	B.	0
		C.	80	D.	40
		Hint
	4.	Estimate the difference to the nearest hundred. 626 − 187
		A.	600	B.	400
		C.	500	D.	700
		Hint
	5.	Estimate the difference to the nearest hundred. 523 − 491
		A.	0	B.	90
		C.	100	D.	80
		Hint